Athenus - Athenus is an authority on science and engineering on the Web, sharing a directory and full-featured web search

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Analytical Sciences Digital Library - peer-reviewed, web-based educational resources in analytical sciences, featuring a variety of formats for techniques and applications

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Biology Browser - From BIOSIS. Great for systematics, plant and animal. Includes search engine for Zoological Record

Biology Browser

CERN Document Server - great search and directory for experiments, archives, articles, books, presentations, and so much more within their documents

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Chem BioFinder - Register with PerkinElmer to check out the Chem BioFinder and look up information about chemicals, including their properties and reactions

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More links on Cyclopaedia Universalis – Research – Science