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Encyclopedia of Associations: National Organizations of the U.S.

Comprehensive source of detailed information concerning nonprofit American membership organizations of national scope. Covers more than 23,000 organizations in categories such as trade, business, and commercial; legal, governmental, public administration, and military; cultural; educational; veterans, hereditary, and patriotic; athletic and sports; fan clubs, and many more.

Environmental History (Gale)

Includes digitized archival material from a selection of Conservation Collections in Denver Public Library's Special Collections and Archives. Search original historical documents about public land management, wildlife conservation, and individuals and organizations who shaped the American conservation movement.