A true citation index: Your single destination to the world’s largest collection of research data, books, journals, proceedings, publications and patents. Covers all subject areas.
Provides full text for more than 4,600 journals, including full text for nearly 3,900 peer-reviewed titles. PDF backfiles to 1975 or further are available for well over one hundred journals, and searchable cited references are provided for more than 1,000 titles.
Indexes bibliographic information and abstracts for the Geographical, Earth, and Ecological sciences
Tries to provides a simple way to broadly search for scholarly literature.
Comprises more than 23 million citations for biomedical literature from MEDLINE, life science journals, and online books. - Coverage: 1950 -