by Daniel G. Driscoll ... [and others] ; prepared in cooperation with the South Dakota Department of Environment and Natural Resources and the West Dakota Water Development District
by Landon, M.K... [and others] ; prepared in cooperation with the University of Minnesota Department of Soil Science and the U.S. Department of Agriculture, Agricultural Research Service
by G.N. Delin ... [and others] ; prepared in cooperation with the University of Minnesota Department of Soil Science, the U.S. Department of Agriculture, Agricultural Research Service, and the Minnesota Pollution Control Agency