Web of Science
A collection of indexes to the literature of the arts & humanities, the social sciences, as well as the sciences. It is based on the citation indexes from ISI which collectively index more than 8,700 high quality, peer-review journals cover-to-cover, providing users with complete bibliographic data, full-length author abstracts, and cited references from the world's most influential journals. You may search one or all databases at one time.
(Formerly called Web of Knowledge)