Science Citation Index Expanded (ISI)
Covers the most of the sciences, including veterinary medicine and zoology. Provides bibliographic citations, plus author abstracts "for approximately 70% of the articles in the database." Each citation also includes a list of references cited in the source article. In addition, it is possible to retrieve a list of works that have cited a specific author or a specific earlier work. Indexes articles, reviews, letters, etc. from over "5,300 major journals across 164 scientific disciplines. Impact factors for many journals is also available. Basic truncation symbol is the asterisk: *.
Coverage: 1975 - present, updated weekly.