All Sciences: Web of Science, Scopus, Academic Search Complete
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Biology: PubMed, BIOSIS
Chemistry: Web of Science, SciFinder (you must register as a user first), American Chemical Society Journals
Computer Science: Academic Search Complete, ACM Digital Library, IEEE Xplore
Environmental Sciences: Academic Search Complete
Neuroscience/Medical Sciences: PubMed, Animal Behavior Abstracts
Physics: Web of Science, Scopus, arXiv.org
Psychology: PsycINFO, PsycARTICLES, Animal Behavior Abstracts