U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature.
Materials relating to all aspects of agriculture forestry and animal science.
Geology and earth sciences literature
Scholarly literature of Latin America
Books and other materials in libraries worldwide
GEOSCAN is the bibliographic database for scientific publications of the Earth Sciences Sector (ESS) of Natural Resources Canada.
"HathiTrust is a partnership of academic & research institutions, offering a collection of millions of titles digitized from libraries around the world."--HathiTrust Website
Declassified government documents central to U.S. foreign policy, intelligence, and security since 1945.
A comprehensive collection of scholarship focusing on the lives and events which have shaped African American and African history and culture. Includes major reference works, biographies, bibliographies, primary source documents, images, maps, and other supplementary material.