Herons and their allies :
atlas of Atlantic coast colonies, 1975 and 1976 /
by Ronald G. Osborn and Thomas W. Custer.

APA Citation

Osborn, R. G., Custer, T. W., U.S. Fish and Wildlife Service. Office of Biological Services. (1978). Herons and their allies: atlas of Atlantic coast colonies, 1975 and 1976. [Washington]: Biological Services Program, Fish and Wildlife Service, U. S. Dept. of the Interior.

MLA Citation

Osborn, Ronald G, Thomas W Custer, and U.S. Fish and Wildlife Service. Office of Biological Services. Herons And Their Allies: Atlas of Atlantic Coast Colonies, 1975 And 1976. [Washington]: Biological Services Program, Fish and Wildlife Service, U. S. Dept. of the Interior, 1978.