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Caithamer, D. F., J. A. Dubovksy. F. A. Johnson, J. R. Kelley, Jr. and G. W. 
      Smith. 1993. Waterfowl status and fall flight forecast, 1993. U.S. Fish 
      and Wildl. Serv., Annu. Rept. 37 pp.
      
Cowardin, L. M., A. B. Sargeant and H. F. Duebbert. 1983. Problems and 
      potentials for prairie ducks. Naturalist 34:4-11.
      
Cowardin, L. M., D. S. Gilmer and C. W. Shaiffer. 1985. Mallard recruitment in 
      the agricultural environment of North Dakota. Wildl. Monogr. 92. 37 pp.
      
Cowardin, L. M., D. H. Johnson, T. L. Shaffer and D. W. Sparling. 1988. 
      Application of a simulation model to decisions in mallard management. 
      U.S. Fish and Wildl. Serv., Fish and Wildl. Tech. Rept. 17. 28 pp.
      
Duebbert, H. F. and H. A. Kantrud. 1974. Upland duck nesting related to land 
      use and predator reduction. J. Wildl. Manage. 38:257-265.
      
Geissler, P. H. and J.R. Sauer. 1990. Topics in route-regression analysis. 
      Pages 54-57 in J. R. Sauer and S. Droege, eds., Survey designs and 
      statistical methods for the estimation of avian population trends. U.S. 
      Fish and Wildl. Serv. Biol. Rept. 90(1).
      
Haugse, C. 1990. Farm animals - Do we need them? North Dakota Farm Res. 43:3-7.

Hunnicutt, M. A. and R. E. Reynolds. 1993. Results of the Four Square Mile 
      waterfowl population survey in the Prairie Pothole Joint Venture area of 
      North Dakota, South Dakota, and Montana. Unpubl. rept., U.S. Fish and 
      Wildl. Serv., Bismarck, ND. 36 pp.
      
Johnson, D. H. 1979. Estimating nest success: The Mayfield method and an 
      alternative. Auk. 96:651-661.
      
Johnson, D. H. and M. D. Schwartz. 1993a. The Conservation Reserve Program: 
      Habitat for grassland birds. Great Plains Res. 3:273-295.	
     
Johnson, D. H. and M. D. Schwartz. 1993b. The Conservation Reserve Program and 
      grassland birds. Conserv. Biol. 7:934-937.
      
Kantrud, H. A. 1993. Duck nest success on Conservation Reserve Program land in 
      the prairie pothole region. J. Soil and Water Conserv. 48:238-242.
       	
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 and Wildl. Serv. Resour. Publ. 158. 24 pp.
      
Klett, A. T., T. L. Shaffer and D. H. Johnson. 1988. Duck nest success in the 
      prairie pothole region. J. Wildl. Mange. 52:431-440.
      
Lysne, L. A. 1991. Small mammal demographics in North Dakota Conservation 
      Reserve Program plantings. M.S. thesis. Univ. North Dakota, Grand Forks. 
      48 pp.
      
Manna, R. W., H. L. Morrison and E. C. Meslow. 1984. The use of guilds in 
      forest bird management. Wildl. Soc. Bull. 12:426-430.
      
Osborn, T. 1993. The Conservation Reserve Program, status, future and policy 
      options. J. Soil and Water Conserv. 48:271-279.
      
Peterjohn, B. G. and J. R. Sauer. 1993. North American breeding bird survey 
      annual summary 1990-1991. Bird Populations. 1:1-15.
      
Robbins, C. S., D. Bystrak and P. H. Geissler. 1986. The breeding bird survey: 
      Its first fifteen years. 1965-1979. U.S. Fish and Wildl. Serv. Resour. 
      Publ. 157. 196 pp.
      
Sargeant, A. B., S. H. Allen and J.O. Hastings. 1987. Spatial relations between 
      sympatric coyotes and red foxes in North Dakota. J. Wildl. Manage. 51: 
      285-293.
      
Sovada, M. A. 1993. Differential effects of coyotes versus red foxes on duck 
      nest success in managed uplands. Ph.D. diss. North Dakota St. Univ., 
      Fargo. 107 pp.