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Barnes, R. D.  1968.  Invertebrate Zoology, second edition. W. B. Saunders 
     Company, Philadelphia, PA, USA.

Clarke, A. H.  1981.  The Freshwater Molluscs of Canada.  National Museum 
     of Natural Sciences, Ottawa, ON, Canada.

Dahl, T. E.  1990.  Wetland losses in the United States 1780's to 1980's. 
     U.S. Fish and Wildlife Service, Washington, DC, USA.

Dahl, T. E. and C. E. Johnson.  1991.  Status and trends of wetlands in the
      coterminous United States, mid-1970's to mid-1980's. U.S. Fish and 
      Wildlife Service, Washington, DC, USA.

Euliss, N. H., Jr. and D. M. Mushet.  1996.  Water-level fluctuation in 
     wetlands as a function of landscape condition in the prairie pothole 
     region.  Wetlands 16:587-593.

Euliss, N. H. Jr. and D. M. Mushet.  1999.  Influence of agriculture on aquatic
     invertebrate communities of temporary wetlands in the prairie pothole 
     region of North Dakota, USA. Wetlands 19:578-583.

Euliss, N. H., Jr., D. M. Mushet, and D. H. Johnson.  2001.  Use of macro-
     invertebrates to identify cultivated wetlands in the prairie pothole 
     region. Wetlands 21:223-231.

Euliss, N. H., Jr., D. A. Wrubleski, and D. M. Mushet.  1999.  Wetlands of the 
     prairie pothole region:  invertebrate species composition, ecology, and 
     management.  p. 471-514. In D. P. Batzer, R. B. Rader, and S. A. Wissinger
     (eds.)  Invertebrates in Freshwater Wetlands of North America -- Ecology 
     and Management.  John Wiley and Sons, Inc., New York, NY, USA.

Federal Interagency Committee for Wetlands Delineation.  1989.  Federal manual
     for identifying and delineating jurisdictional wetlands. U.S. Army Corps 
     of Engineers, U.S. Environmental Protection Agency, U.S. Fish and Wildlife 
     Service, and U.S.D.A. Soil Conservation Service, Washington, DC, USA. 
     Cooperative Technical Publication.

Kantrud, H. A. and W. E. Newton.  1996.  A test of vegetation-related 
     indicators of wetland quality in the prairie pothole region. Journal 
     of Aquatic Ecosystem Health 5:177-191.

National Research Council.  1995.  Wetlands-characteristics and boundaries. 
     National Academy Press, Washington, DC, USA.

Reed, P. B.  1988.  National list of plant species that occur in wetlands: 
     National summary. U.S. Fish and Wildlife Service, Washington, DC, USA. 
     Biological Report 88(24).

Stewart, R. E. and H. A. Kantrud.  1971.  Classification of natural ponds and 
     lakes in the glaciated prairie region. U.S. Fish and Wildlife Service, 
     Washington, DC, USA. Resource Publication 92.

Tiner, R. W.  1984.  Wetlands of the United States: current status and recent 
     trends.  U.S. Fish and Wildlife Service, Washington, DC, USA.

U.S. Army Corps of Engineers.  1987.  USACE wetlands delineation manual. 
     Environmental Laboratory, U.S. Army Corps of Engineers, Waterways 
     Experiment Station, Vicksburg, MS, USA. Technical Report Y-87-1.

U.S. Department of Agriculture.  1994.  National Food Security Act Manual: 
     3rd Edition. U.S.D.A., Soil Conservation Service, Washington, DC, USA. 
     Part 519, 180-V-NFSAM.

U.S. Department of Agriculture.  1996.  Field Indicators of Hydric Soils in 
     the United States. G. W. Hurt, P. M. Whited, and R. F. Pringle (eds.). 
     U.S.D.A., Natural Resources Conservation Service, Fort Worth, TX, USA.

U.S. Environmental Protection Agency.  1988.  EPA Wetland Identification and 
     Delineation Manual (two volumes).  W. S. Sipple (ed.).  U.S. Environmental 
     Protection Agency, Office of Wetlands Protection, Washington, DC, USA.

U.S. Environmental Protection Agency.  1993.  EMAP Project Descriptions. U.S. 
     Environmental Protection Agency, Office of Research and Development, 
     Washington, DC, USA. EPA/620/R-93/009.

van der Kamp, G., W. J. Stolte, and R. G. Clark.  1999.  Drying out of small 
     prairie wetlands after conversion of their catchments from cultivation 
     to permanent brome grass. Hydrological Sciences 44:387-397.