1. R. E. Brogden, 1972 . A model of a Platte-Elkhorn valley aquifer. Unpublished M.S. Thesis. Dept. of Civil Eng. University of Nebraska-Lincoln.
2. R. R. Burchett, 1986 . Geologic bedrock map of Nebraska. Conservation and Survey Division, Institute of Agriculture and Natural Resources, University of Nebraska-Lincoln.
3. R. R. Burchett, E. C. Reed, V. H. Dreeszen, and G. E. Prichard . 1975 . Bedrock geologic map showing thickness of overlying quaternary deposits, Fremont Quadrangle and part of Omaha Quadrangle, Nebraska . U.S. Geological Survey Map1 -905 .
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