ProCon - look at both sides of an issue
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100 Great University Libraries Anyone Can Access Online
Lib guides- Librarian-created topic pathfinders
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Nebraska Library Commission NebraskAccess password: 1867riser22
United States Department of Agriculture
Athenus - a place to find science and engineering on the web
Strategian - The Strategic Guide to Quality Information in Biology, Climate Change, Medicine, and Psychology
Carrot2 - Visual search engine.
Spezify - a search tool presenting results in visual ways