Atlas of gull and tern colonies :
North Carolina to Key West, Florida (including pelicans, cormorants and skimmers) /
by John W. Portnoy, R. Michael Erwin, Thomas W. Custer ; performed for National Coastal Ecosystems Team, Office of Biological Services, Fish and Wildlife Service, U.S. Department of the Interior.
APA Citation
Portnoy, J. W., Custer, T. W., Erwin, R. Michael., Patuxent Wildlife Research Center., Migratory Bird and Habitat Research Laboratory (U.S.)., Massachusetts Cooperative Wildlife Research Unit., National Coastal Ecosystems Team (U.S.). (1981). Atlas of gull and tern colonies: North Carolina to Key West, Florida (including pelicans, cormorants and skimmers). [Washington, D.C.]: The Team.
MLA Citation
National Coastal Ecosystems Team (U.S.), et al.. Atlas of Gull And Tern Colonies: North Carolina to Key West, Florida (including Pelicans, Cormorants And Skimmers). [Washington, D.C.]: The Team, 1981.
Warning: These citations may not always be complete (especially for serials).