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Search Engines
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ISI Highly Cited
A search tool to identify individuals, departments and laboratories that have made fundamental contributions to the advancement of science and technology in recent decades.
http://isihighlycited.com/
Meta Search Engine for Scientific Literature
A multi-search tool that permits queries from scientific journals.
http://www.ojose.com/
Scirus
Search engine that fetches only scientific websites.
http://www.scirus.com/
SciSeek
Science search engine and directory. Also provides forums, tools and related news.
http://www.sciseek.com