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Cowardin, L. M., V. Carter, F. G. Golet, and E. T. LaRoe.  1979. 
     Classification of wetlands and deepwater habitats of the
     United States.  U. S. Fish & Wildlife Service Biological
     Service Program FWS/OBS-79/31.  103pp.

Duebbert, H. F., E. T. Jacobson, K. F. Higgins, and E. B. Podoll.
     1981.  Establishment of seeded grasslands for wildlife
     habitat in the prairie pothole region.  U.S. Fish & Wildlife
     Service Special Scientific Report-Wildlife 234.  21pp.

Giroux, J-F.  1981.  Use of artificial islands by nesting
     waterfowl in southeastern Alberta.  Journal of Wildlife
     Management 45:669-679.

Johnson, D. H. and T. L. Shaffer.  1990.  Estimating nest
     success: when Mayfield wins.  Auk 107:595-600.

Jones, J. D.  1975.  Waterfowl nesting island development. U.S.
     Bureau of Land Management Technical Note 260.  17pp.
     
Klett, A. T., H. F. Duebbert, C. A. Faanes, and K. F. Higgins.
     1986.  Techniques for studying nest success of ducks in
     upland habitats in the prairie pothole region.  U.S. Fish &
     Wildlife Service Resource Publication 158.  24pp.

Lokemoen, J. T.  1984.  Examining economic efficiency of
     management practices that enhance waterfowl production.
     Transactions of the North American Wildlife and Natural
     Resources Conference 49:584-607.

Lokemoen, J. T. and T. A. Messmer.  1993.  Locating,
     constructing, and managing islands for nesting waterfowl.
     U.S. Fish and Wildlife Service, Branch of Extension and
     Publications, Arlington, VA, and The Berryman Institute,
     Logan, UT.  17pp.

Lokemoen, J. T. and R. O. Woodward.  1993.  An assessment of
     predator barriers and predator control to enhance duck nest
     success on peninsulas.  Wildlife Society Bulletin 21:275-
     282.

Messmer, T. A., M. A. Johnson, and F. B. Lee.  1989.  Homemade
     nest sites for mallards.  N.D. State University Extension
     Service, Fargo, N.D. Circular WL-890.  8pp.

Rondeau, A. J. and J. L. Piehl.  1989.  Construction and
     operation of electric fences for predator management.  U.S.
     Fish & Wildlife Service Federal Bldg., Fort Snelling, MN.
     36pp.
     
Stewart, R. E. and H. A. Kantrud.  1971.  Classification of
     natural ponds and lakes in the glaciated prairie region.
     U.S. Fish & Wildlife Service Resource Publication 92.  57pp.