Conservation Directory: The Guide to Worldwide Environmental Organizations. Washington, D.C.: National Wildlife Federation/Island Press. Updated and published annually. Over 4000 listings.Search the previous year's directory on-line: http://www.nwf.org/conservationdirectory/
Wiser Earth. A directory of organizations and individuals addressing central issues of our day. http://www.wiserearth.org/
International Association of Fish and Wildlife Agencies. http://www.iafwa.org/
Belanger, Dian Olson. Managing American Wildlife: A History of the International Association of Fish and Wildlife Agencies. Amherst: University of Massachusetts Press, 1988.
National Geographic Society. http://www.nationalgeographic.com/
Lutz, Caherine A. and Jane L. Collins. Reading National Geographic. Chicago: University of Chicago Press, 1993.
National Wildlife Federation. http://www.nwf.org/
Allen, Thomas B. Guardian of the Wild: The Story of the National Wildlife Federation, 1936-1986. Bloomington: Indiana University Press, 1987.