Reference database that provides access to a large number of biographical sources, atlases, and encyclopedias covering the arts, business, economics, history, literature, science, technology, religion, philosophy, politics, psychology, geography, country studies, and more.
Statista provides statistical data from sources such as opinion research institutions, business organizations, scientific journals, trade publications and government agencies. Topics include business, politics, society, technology, education.
Books on research methods and research basics.