1973. Keller, Stanley J., cartographer. Compilation complete to July 1, 1972.; Base by U.S. Geological Survey; 1950.; Miscellaneous map no. 18.; Includes tables and indexes of underground... Geological Survey, Dept. of Natural Resources.
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1973. Geological Survey (U.S.). Relief shown by contours and spot heights.; Compiled in 1970.; Includes population key.; Source data U.S Dept. of the interior - Geological Survey ... U.S. Geological Survey.
1973. Blue line print.; Includes index to planning area and segment names. Scale approximately 1:500,000. The Board?.