by K.G. Books ... [and others] ; Department of the Interior, United States Geological Survey ; prepared in cooperation with the Minnesota Geological Survey
by Kathy E. Lee ... [and others] ; prepared in cooperation with the Minnesota Pollution Control Agency, the Minnesota Department of Natural Resources, and the Legislative Commission on Minnesota Resources
by G.F. Lindholm ... [and others] ; Department of the Interior, United States Geological Survey ; prepared in cooperation with the Minnesota Department of Natural Resources, Division of Waters, Soils, and Minerals
by J.L. Meuschke ... [and others] ; Department of the Interior, United States Geological Survey ; prepared in cooperation with the Minnesota Geological Survey