Science Citation Index
Provides current and retrospective bibliographic information, author abstracts, and cited references found in over 1,700 of the world's leading scholarly sciences journals covering more than 50 disciplines. Also covers individually selected, relevant items from approximately 3,300 of the world's leading science and technology journals. Updated weekly.
Electronic journal collection in biological, ecological, and environmental sciences. Coverage ends in 2020
Provides online access to electronic journals and covers the sciences, technology, life sciences, and engineering. Update frequency: N/A
Indexes more than 4,800 journals in the fields of medicine, nursing, dentistry, veterinary medicine, and all areas of the biomedical field. Updates: Unknown