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Internet Archive Search

Search add-on for Archive.org
Internet Archive: Universal Access To All Knowledge.

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Open Library Search

Open Library: One web page for every book ever published.

評分: 5 / 5 顆星 (3)
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Science Stack - Academic Search Engine

Academic Search Engine for research paper from Mendeley and PloS. Science Stack provides is useful for finding relevant material and building a bibliography. You have a full scientific library at the click of a button.

評分: 5 / 5 顆星 (1)
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Yale University Library Search

Search the Yale University Library catalog.

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