Cowardin, et al. 1979. "Classification of wetlands and deepwater habitats of the United States", USFWS (FWS/OBS-79/31).
Dahl, T.E. 1990. "Wetlands losses in the United States mid 1780s to mid 1980s", U.S. Dept. of Interior, Fish and Wildlife Service, Washington, D.C.
Dahl, T.E. and C.E. Johnson. 1991. "Status and trends of wetlands in the Conterminous United States, mid 1979s to mid 1980s", U.S. Dept. of Interior, Fish and Wildlife Service, Washington, D.C.
Huberty, B. 2009. "Remote Sensing Overview for mapping and monitoring wetlands", Society of Wetland Scientists, Annual Meeting, Madison, WI. http://aqua.wisc.edu/SOLM/LinkClick.aspx?fileticket=810kLuRKvtw%3D&...
Wilen, B.O. and R.W. Tiner, Jr. 1989. "The National Wetlands Inventory - the First Ten Years. In: Wetlands: Concerns and Successes. American Water Resources Assoc.
Wilen, B. 1992. "National Wetlands Inventory Products", in Forum on Land Use and Land Cover, Summary Report. USGS/EPA, Reston, VA.