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<div class="pre-content"><div><div class="bk_prnt"><p class="small">NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.</p></div><div class="pagination bk_noprnt"><span class="inactive page_link prev">< Prev</span><a class="active page_link next" href="/books/n/helpbookshelf/intro/" title="Next page in this title">Next ></a></div></div></div>
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<div class="main-content lit-style" itemscope="itemscope" itemtype="http://schema.org/Book"><div class="meta-content fm-sec"><div class="iconblock whole_rhythm clearfix no_top_margin"><a href="http://www.ncbi.nlm.nih.gov/books" title="National Center for Biotechnology Information (US)" class="img_link icnblk_img" ref="pagearea=logo&targetsite=external&targetcat=link&targettype=publisher"><img class="source-thumb" src="/corehtml/pmc/pmcgifs/bookshelf/thumbs/th-helpbookshelf-lrg.png" alt="Cover of Bookshelf Help" /></a><div class="icnblk_cntnt"><h1 id="_NBK3833_"><span itemprop="name">Bookshelf Help</span></h1><div class="half_rhythm">Bethesda (MD): <a href="http://www.ncbi.nlm.nih.gov/" ref="pagearea=meta&targetsite=external&targetcat=link&targettype=publisher"><span itemprop="publisher">National Center for Biotechnology Information (US)</span></a>; <span itemprop="datePublished">2005</span>-.</div><div class="half_rhythm"><ul class="inline_list"><li><span class="label"><a data-jig="ncbidialog" href="#_ncbi_dlg_cpyrght_NBK3833" data-jigconfig="modal:true">Copyright and
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Permissions</a></span></li></ul></div><div id="_ncbi_dlg_cpyrght_NBK3833" style="display:none" title="Copyright and Permissions"><div>This publication is in the public domain. For more information, see the <a href="/books/about/copyright/">Bookshelf Copyright Notice</a>.</div></div><div class="bk_noprnt"><form method="get" action="/books/n/helpbookshelf/" id="bk_srch"><div class="bk_search"><label for="bk_term" class="offscreen_noflow">Search term</label><input type="text" title="Search this book" id="bk_term" name="term" value="" data-jig="ncbiclearbutton" /> <input type="submit" class="jig-ncbibutton" value="Search this book" submit="false" style="padding: 0.1em 0.4em;" /></div></form></div></div></div></div><div class="body-content whole_rhythm" itemprop="text"><div itemprop="description"><p>Bookshelf, the books division of the NLM Literature Archive (LitArch) at the National Center for Biotechnology Information (NCBI),
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is an online searchable collection of books, reports, databases, and other scholarly literature in biology, medicine, and the
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life sciences. This documentation describes the Bookshelf project and features for accessing the literature and addresses some commonly asked questions.</p></div><div><h2>Contents</h2><div class="bktoc_all_cntnr top align_right" style="display:none"><ul class="inline_list_right"><li><a class="bktoc_all_exp" href="#">Expand All</a></li><li style="margin-left:.8em"><a class="bktoc_all_clps" href="#">Collapse All</a></li></ul></div><ul id="toc_tllNBK3833_toc_intro" class="simple-list toc toc-toggle"><li class="half_rhythm" id="toc_itm_NBK3833_toc_intro"><a class="toc-item" href="/books/n/helpbookshelf/intro/">Introduction</a><div class="small">Created: September 30, 2010; Last Update: January 15, 2021.</div><ul id="toc_lst_NBK3833_toc_intro" class="simple-list toc bktoc_lst_exp"><li class="half_rhythm" id="toc_itm_NBK3833_toc_intro_Searching_Bookshelf"><a class="toc-item" href="/books/n/helpbookshelf/intro/#intro.Searching_Bookshelf">Searching Bookshelf</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_intro_Browsing_versus_Searching"><a class="toc-item" href="/books/n/helpbookshelf/intro/#intro.Browsing_versus_Searching">Browsing <i>versus</i> Searching</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_intro_Integration_with_Other_NCBI_Databa"><a class="toc-item" href="/books/n/helpbookshelf/intro/#intro.Integration_with_Other_NCBI_Databa">Integration with Other NCBI Databases</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_intro_Copyright_Permissions_and_Conditio"><a class="toc-item" href="/books/n/helpbookshelf/intro/#intro.Copyright_Permissions_and_Conditio">Copyright, Permissions, and Conditions of Use</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_intro_Information_for_Authors_and_Publis"><a class="toc-item" href="/books/n/helpbookshelf/intro/#intro.Information_for_Authors_and_Publis">Information for Authors and Publishers</a></li></ul></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_quickstart"><a class="toc-item" href="/books/n/helpbookshelf/quickstart/">Quick Start Guide</a><div class="small">Created: September 30, 2010; Last Update: August 27, 2013.</div><ul id="toc_lst_NBK3833_toc_quickstart" class="simple-list toc bktoc_lst_exp"><li class="half_rhythm" id="toc_itm_NBK3833_toc_quickstart_Search_Tips"><a class="toc-item" href="/books/n/helpbookshelf/quickstart/#quickstart.Search_Tips">Search Tips</a></li></ul></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_browse"><a class="toc-item" href="/books/n/helpbookshelf/browse/">Browsing Bookshelf</a><div class="small">Created: September 30, 2010; Last Update: February 18, 2014.</div><ul id="toc_lst_NBK3833_toc_browse" class="simple-list toc bktoc_lst_exp"><li class="half_rhythm" id="toc_itm_NBK3833_toc_browse_From_the_Bookshelf_Homepage"><a class="toc-item" href="/books/n/helpbookshelf/browse/#browse.From_the_Bookshelf_Homepage">From the Bookshelf Homepage</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_browse_From_the_Browse_Titles_Page"><a class="toc-item" href="/books/n/helpbookshelf/browse/#browse.From_the_Browse_Titles_Page">From the Browse Titles Page</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_browse_From_a_Publication_s_Table_of_Con"><a class="toc-item" href="/books/n/helpbookshelf/browse/#browse.From_a_Publication_s_Table_of_Con">From a Publication’s Table of Contents</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_browse_From_within_a_Page"><a class="toc-item" href="/books/n/helpbookshelf/browse/#browse.From_within_a_Page">From within a Page</a></li></ul></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_search"><a class="toc-item" href="/books/n/helpbookshelf/search/">Searching Bookshelf</a><div class="small">Created: September 30, 2010; Last Update: February 11, 2019.</div><ul id="toc_lst_NBK3833_toc_search" class="simple-list toc bktoc_lst_exp"><li class="half_rhythm" id="toc_itm_NBK3833_toc_search_Facets"><a class="toc-item" href="/books/n/helpbookshelf/search/#search.Facets">Facets</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_search_Advanced_Search"><a class="toc-item" href="/books/n/helpbookshelf/search/#search.Advanced_Search">Advanced Search</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_search_Displaying_Your_Search_Results"><a class="toc-item" href="/books/n/helpbookshelf/search/#search.Displaying_Your_Search_Results">Displaying Your Search Results</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_search_Links_to_Related_Data_in_Other_NC"><a class="toc-item" href="/books/n/helpbookshelf/search/#search.Links_to_Related_Data_in_Other_NC">Links to Related Data in Other NCBI Resources</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_search_Displaying_the_Search_Details"><a class="toc-item" href="/books/n/helpbookshelf/search/#search.Displaying_the_Search_Details">Displaying the Search Details</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_search_Creating_Alerts"><a class="toc-item" href="/books/n/helpbookshelf/search/#search.Creating_Alerts">Creating Alerts</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_search_Saving_and_Emailing_Results_and_S"><a class="toc-item" href="/books/n/helpbookshelf/search/#search.Saving_and_Emailing_Results_and_S">Saving and E-mailing Results and Searches</a></li></ul></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_faq"><a class="toc-item" href="/books/n/helpbookshelf/faq/">Frequently Asked Questions</a><div class="small">Created: September 30, 2010; Last Update: September 29, 2022.</div><ul id="toc_lst_NBK3833_toc_faq" class="simple-list toc bktoc_lst_exp"><li class="half_rhythm" id="toc_itm_NBK3833_toc_faq_Copyright_and_Permissions"><a class="toc-item" href="/books/n/helpbookshelf/faq/#faq.Copyright_and_Permissions">Copyright and Permissions</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_faq_PubReader_and_PDF_format"><a class="toc-item" href="/books/n/helpbookshelf/faq/#faq.PubReader_and_PDF_format">PubReader and PDF format</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_faq_Hard_Copy_Versions"><a class="toc-item" href="/books/n/helpbookshelf/faq/#faq.Hard_Copy_Versions">Hard Copy Versions</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_faq_Applications_and_Submissions"><a class="toc-item" href="/books/n/helpbookshelf/faq/#faq.Applications_and_Submissions">Applications and Submissions</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_faq_Cataloging"><a class="toc-item" href="/books/n/helpbookshelf/faq/#faq.Cataloging">Cataloging</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_faq_Citations"><a class="toc-item" href="/books/n/helpbookshelf/faq/#faq.Citations">Citations</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_faq_Other_General_Questions"><a class="toc-item" href="/books/n/helpbookshelf/faq/#faq.Other_General_Questions">Other General Questions</a></li></ul></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_Tutorials"><a class="toc-item" href="/books/n/helpbookshelf/Tutorials/">Tutorials</a><div class="small">Last Update: July 1, 2024.</div><ul id="toc_lst_NBK3833_toc_Tutorials" class="simple-list toc bktoc_lst_exp"><li class="half_rhythm" id="toc_itm_NBK3833_toc_Tutorials_Tutorial_1_Browsing"><a class="toc-item" href="/books/n/helpbookshelf/Tutorials/#Tutorials.Tutorial_1_Browsing">Tutorial 1: Browsing</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_Tutorials_Tutorial_2_Search"><a class="toc-item" href="/books/n/helpbookshelf/Tutorials/#Tutorials.Tutorial_2_Search">Tutorial 2: Search</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_Tutorials_Tutorial_3_Inside_a_book"><a class="toc-item" href="/books/n/helpbookshelf/Tutorials/#Tutorials.Tutorial_3_Inside_a_book">Tutorial 3: Inside a book</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_Tutorials_Tutorial_4_Using_facets"><a class="toc-item" href="/books/n/helpbookshelf/Tutorials/#Tutorials.Tutorial_4_Using_facets">Tutorial 4: Using facets</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_Tutorials_Tutorial_5_Advanced_search"><a class="toc-item" href="/books/n/helpbookshelf/Tutorials/#Tutorials.Tutorial_5_Advanced_search">Tutorial 5: Advanced search</a></li></ul></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_findingaide"><a class="toc-item" href="/books/n/helpbookshelf/findingaide/">Bookshelf Queries and Discovery Guides</a><div class="small">Created: July 1, 2024.</div><ul id="toc_lst_NBK3833_toc_findingaide" class="simple-list toc bktoc_lst_exp"><li class="half_rhythm" id="toc_itm_NBK3833_toc_findingaide_Discovery_by_Subject"><a class="toc-item" href="/books/n/helpbookshelf/findingaide/#findingaide.Discovery_by_Subject">Discovery by Subject</a></li><li class="half_rhythm" id="toc_itm_NBK3833_toc_findingaide_Discovery_by_Format"><a class="toc-item" href="/books/n/helpbookshelf/findingaide/#findingaide.Discovery_by_Format">Discovery by Format</a></li></ul></li></ul><div class="bktoc_all_cntnr align_right" style="display:none"><ul class="inline_list_right"><li><a class="bktoc_all_exp" href="#">Expand All</a></li><li style="margin-left:.8em"><a class="bktoc_all_clps" href="#">Collapse All</a></li></ul></div></div></div></div>
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