Academic Search Engines
Semantic Scholar - AI Powered Research Tool for Scientific Literature
BASE - Bielefeld Academic Search Engine : multi-disciplinary search engine to scholarly internet resources, created by Bielefeld University Library
Hathi Trust & MIT Institutional Repository : digital libraries offering e-resources and academic studies
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Digital Libraries for E-books and Other Media
Open Culture :
Digital library of audio books, movies, podcasts, learning tools and online classes
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Project Gutenberg & Open Library : digital libraries offering e-books
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Digital Libraries for Primary Sources
Internet Archive :
digital library offering free universal access to books, movies & music, as well as 624 billion archived web pages
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Europeana :
Digital library of EU offering digitized primary sources of EU archives and memory institutions
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Arts & Music
Quote Investigator & Petrucci Music Library : digital libraries to search quotes and free music scores
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ArtStor :
Digital library of arts and multimedia
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Science & Engineering & Medicine
WolframAlpha :
A tool used to respond factual queries by computing answers populated from data of academic and commercial websites
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National Science Digital Library & The National Center for Biotechnology Information & Creative Chemistry : digital libraries to search scientific reports, research data, articles and news
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Economics & Business
The World Factbook & UN National Statistical Data : digital libraries to search national statistics
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EkonBiz :
An academic search portal for journals, working papers, and conferences in business studies and economics which is launched by the ZBW - German National Library of Economics, Leibniz Information Centre for Economics.
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