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Adams, G.D., 1988. Wetlands of the prairies of Canada. In: Wetlands of Canada. 
     Ecol. Land Classification Ser., 24: 155-198.

American Society for Photogrammetry and Remote Sensing, 1988. The New World of 
     Remote Sensing (audio tape). Falls Church, VA.

Cowardin, L.M., Arnold, P.M., Shaffer, T.L., Pywell, H.R. and Miller, L.D., 
     1988a. Duck numbers estimated from ground counts, MOSS map data, and 
     aerial video. In: J.D. Scurry (Editor), Proc. Fifth National MOSS Users 
     Workshop, Louisiana Sea Grant College Program, 2-5 May 1988, Baton Rouge, 
     LA, and US Fish and Wildlife Service, Slidell, LA, pp.205-219.

Cowardin, L.M., Johnson, D.H., Shaffer, T.L. and Spading, D.W., 1988b. 
     Applications of a simulation model to decisions in mallard management. 
     Tech. Rep. 17, US Fish and Wildlife Service, Washington, DC, 28 pp.

Crissey, W.F., 1969. Prairie potholes from a continental viewpoint. In: 
     Saskatoon Wetlands Seminar. Can. Wildl. Serv. Rep. Ser., 6:161-171.

Dahl, T.E., 1992. Wetlands losses in the United States--1780's to 1980's. 
     Report to Congress. US Fish and Wildlife Service, Washington, DC.

Dwyer, T.J., Krapu, G.L. and Janke, D.M., 1979. Use of prairie pothole habitat 
     by breeding mallards. J. Wildl. Manage., 43:526-531.

Johnson, D.H., Hammond, M.C., McDonald, T.L., Nustad, C.L. and Schwartz, M.D., 
     1989. Breeding canvasbacks: a test of a habitat model. Prairie Nat., 
     21:193-202.

Johnson, D.H. and Schwartz, M.D., 1993. The Conservation Reserve Program and 
     breeding birds. Conserv. Biol., in press.

Johnson, D.H., Sparling, D.W. and Cowardin, L.M., 1987. A model of the 
     productivity of the mallard duck. Ecol. Model., 38:257-275.

Kantrud, H.A., 1993. Duck nest success in Conservation Reserve Program land in 
     the prairie pothole region. J. Soil Water Conserv., 48:238-242.

Kantrud, H.A., Krapu, G.L. and Swanson, G.A., 1989. Prairie basin wetlands of 
     the Dakotas: a community profile. Biol. Rep. 85 (7.28), US Fish and 
     Wildlife Service, Washington, DC, 111 pp.

Koeln, G.T., Jacobson, J.E., Wesley, D.E. and Rempel, R.S., 1988. Wetland 
     inventories derived from Landsat data for waterfowl management planning. 
     Trans. North Am. Wildl. Nat. Resour. Conf, 53:303-310.

Küchler, A.W., 1964. Potential natural vegetation of the conterminous United 
     States. Spec. Publ. 36, American Geographical Society, New York, 116 pp.

Laycock, W.A., 1991. The Conservation Reserve Program--how did we get where we 
     are and where do we go from here? In: L.A. Joyce, J.E. Mitchell and M.D. 
     Skold (Editors), The Conservation Reserve--Yesterday, Today and Tomorrow. 
     Gen. Tech. Rep. RM-203, US Department of Agriculture Forest Service, Fort 
     Collins, CO, pp. 1-6.

Mann, G.E., 1974. The prairie pothole region--a zone of environmental 
     opportunity. Naturalist, 25(4):2 (map).

McHarg, I.L., 1992. Design with Nature. Wiley, New York 197 pp.

Nelson, J.W. and Wishart, R.A., 1988. Management of wetland complexes for 
     waterfowl production: planning for the prairie habitat joint venture. 
     Trans. North Am. Wildl. Nat. Resour. Conf., 53:444-453.

Sargeant, A.B., Greenwood, R.G., Sovada, M.A. and Shaffer, T.L., 1993. 
     Distribution and abundance of predators that affect duck production--
     prairie pothole region. Resour. Publ. 194, US Fish and Wildlife Service, 
     Washington, DC, 96 pp.

Sargeant, A.B. and Raveling, D.G., 1992. Mortality during the breeding season. 
     In: B.D.G. Batt, A.D. Afton, M.G. Anderson, C.D. Ankney, D.H. Johnson, 
     J.A. Kadlec and G.L. Krapu (Editors), Ecology and Management of Breeding 
     Waterfowl. University of Minnesota Press, Minneapolis, pp.396-422.

Scott, J.M., Davis, F., Csuti, B., Noss, R., Butterfield, B., Groves, C., 
     Anderson, H., Caicco, S., D'Erchia, F., Edwards, Jr., T.C., Ulliman, J. 
     and Wright, R.G., 1993. Gap analysis: a geographical approach to 
     protection of biological diversity. Wildl. Monogr., 123:1-41.

Sidle, J.G., 1983. Ducks, government and private land. Naturalist, 34:12-19.

Smith, A.G., Stoudt, J.H. and Gollop, J.B., 1964. Prairie potholes and marshes. 
     In: J.P. Linduska (Editor), Waterfowl Tomorrow. US Department of the 
     Interior, Fish and Wildlife Service, Washington, DC, pp. 39-50.

Stewart, R.E., 1975. Breeding Birds of North Dakota. Tri-college Center for 
     Environmental Studies, Fargo, ND, 295 PP.

Turner, M.G., 1989. Landscape ecology: the effect of pattern on process. Annu. 
     Rev. Ecol. Syst., 20:171-197.

Umber, H., 1992. A pheasant dream revisited: North Dakota in the '90s. N.D. 
     Outdoors, 55(3):2-7. 

US Fish and Wildlife Service, 1980. Habitat evaluation procedures (HEP). 
     Ecological Services Manual 102. US Fish and Wildlife Service, Division of 
     Ecological Services, Washington, DC.

US Fish and Wildlife Service, 1981. Standards for the development of habitat 
     suitability index models. Ecological Services Manual 103. US Fish and 
     Wildlife Service, Division of Ecological Services, Washington, DC.

US Fish and Wildlife Service, 1988. Final Environmental assessment for proposed 
     establishment of the Hamden Slough National Wildlife Refuge--Becker 
     County, Minnesota. US Fish and Wildlife Service, Region 3, Minneapolis, 
     MN, 86 pp.

US Fish and Wildlife Service and Canadian Wildlife Service, 1986. North 
     American Waterfowl Management Plan: A strategy for cooperation. US Fish 
     and Wildlife Service, Washington, DC, and Canadian Wildlife Service, 
     Ottawa, Ont, 19 pp.

Van der Valk, A. (Editor), 1989. Northern Prairie Wetlands. Iowa State 
     University Press, Ames, 400 pp.

Wilen, B.O., 1990. The US Fish and Wildlife Service's National Wetland 
     Inventory. Biol. Rep. 90 (18), US Fish and Wildlife Service, Washington, 
     DC, pp. 9-19.

Winter, T.C., 1989. Hydrologic studies of wetlands in the prairie pothole 
     region. In: van der Valk, A. (Editor), Northern Prairie Wetlands. Iowa 
     State University Press, Ames, pp. 16-54.