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A database that helps find the geoscience literature of the world, including millions of references to geoscience journal articles, ebooks, maps, conference papers, reports, and theses. Coverage dates: 1785 - present
Journal articles, conference proceedings, patents, and more in the sciences, social sciences, and arts and humanities. Coverage dates: 1864 - present
Journal articles and ebooks published by Elsevier. Includes science, engineering, technology, medicine, and business. Coverage dates: 1823 - present.
Scholarly journals from first issue to 3-5 years ago, plus scholarly ebooks. Multiple subjects, especially strong in arts and sciences. Coverage dates: 1800 - present