by S.G. Robson ... [and others] ; Department of the Interior, United States Geological Survey ; prepared in cooperation with the Colorado Department of Natural Resources, Division of Water Resources, Office of the State Engineer ... [and others]
by E.D. Gutentag ... [and others] ; Department of the Interior, United States Geological Survey ; prepared in cooperation with the State Geological Survey of Kansas, Kansas Department of Health, Kansas State Board of Agriculture