Premier bibliographic database for botany. > 26 million references in biology to major, international journals. Coverage back to 1926.

A database of nearly 2 million herbaria specimen images from around the world. Some special collection materials such as Carl Linneaus's annotated editions of Species Naturae and illustrations from Curtis's Botanical Magazine. (from JSTOR)

This database combines the ProQuest Agricultural & Environmental Science Collection, the Meteorological and Geoastrophysical Abstracts, Biological Science Database, Water Resources Abstracts, EIS: Digest of Environmental Impact Statements, Environmental Engineering Abstracts, Pollution Abstracts, and Earth, Atmospheric & Aquatic Science Database into a single search platform, with coverage from 1946-present.

Interdisciplinary bibliographic database covering international journals, some back as far as 1823.

Interdisciplinary bibliographic database for all fields in science. (Science Citation Index) Coverage of international journals 1900-. Offers cited reference searching in addition to author and topic searching.

Major bibliographic database for zoology and natural history. Coverage of international journals 1864-.