1. Batt, B.D.J., M.G. Anderson, C.D. Anderson, and F.D. Caswell. 1989. The use of prairie potholes by North American ducks. p. 204–227.In A.G. van der Valk (ed.) Northern Prairie Wetlands. Iowa State University Press, Ames, IA, USA.
2. Bishop, R.A. 1981. Iowa’s wetlands. Proceedings of the Iowa Academy of Science 88:11–16.
3. Bortner, J.B., F.A. Johnson, G.W. Smith, and R.E. Trost. 1991. 1991 status of waterfowl and fall flight forecast. U.S. Fish and Wildlife Service Office of Migratory Bird Management, Laurel, MD, USA.
4. Brown, M. 1985. Iowa marsh birds and the theory of island biogeography. M.S. Thesis, Iowa State University, Ames, IA, USA.
5. Brown, M. and J.J. Dinsmore. 1986. Implications of marsh size and isolation for marsh bird management. Journal of Wildlife Management 50:392–397.