Potential impacts of agricultural chemicals on waterfowl and other wildlife inhabiting prairie wetlands: An evaluation of research needs and approaches - Grue, C.E.; DeWeese, L.R.; Mineau, P.; Swanson, G.A.; Foster, J.R.; Arnold, P.M.; Huckins, J.N.; Sheenan, P.J.; Marshall, W.K.; Ludden, A.P. (Transactions of the North American Wildlife and Natural Resources Conference, 1986)