More Academic Search Engines
Use these web search engines to find credible academic sources:
U.S. National Archives Catalog - this contains historical U.S. government documents (federal, congressional, and presidential records) that are created or received by the President and his staff, by Congress, by employees of Federal government agencies, and by the Federal courts in the course of their official duties.
BASE (Bielefeld Academic Search Engine) - over 29 million documents
Biology Search Engines - a list of multiple biology-related search engines
Chemxseer - "documents in the chemistry domain"
Computer Science Bibliographies - computer-science related information
ERIC (Educational Resource Information Center) - "online digital library of education research and information"
Google Scholar - a simple way to broadly search for scholarly literature
History Engine - “a collection of thousands of historical “episodes” that paints a wide-ranging portrait of the past”
Library of Congress - search for primary source documents, including photos, maps, manuscripts, historic newspapers and much more
NASA - historical archive
RefSeek - search over 1 billion documents, web pages, encyclopedias, journals, newspapers
The Smithsonian Institution Research Information System - “search over 16 million records, with 5.1 million images, video and sound files from Smithsonian museums, archives, and libraries”
Science.gov - over 60 databases and over 2,200 scientific websites to provide users with access to more than 200 million pages of authoritative federal science information including research and development results
Sweet Search - selective searches for students
World-Wide Science - searching of national and international scientific databases and portals