Dahl, T. E., Johnson, C. E., & Frayer, W. E. (1991). Wetlands, status and trends in the conterminous United States, mid-1970's to mid-1980's: First update of the national wetlands status report. U.S. Dept. of the Interior, Fish and Wildlife Service.
Chicago Style (17th ed.) CitationDahl, Thomas E., Craig E. Johnson, and W. E. Frayer. Wetlands, Status and Trends in the Conterminous United States, Mid-1970's to Mid-1980's: First Update of the National Wetlands Status Report. Washington, D.C.: U.S. Dept. of the Interior, Fish and Wildlife Service, 1991.
MLA (9th ed.) CitationDahl, Thomas E., et al. Wetlands, Status and Trends in the Conterminous United States, Mid-1970's to Mid-1980's: First Update of the National Wetlands Status Report. U.S. Dept. of the Interior, Fish and Wildlife Service, 1991.