1927. Geological Survey (U.S.). Relief shown by contours and spot heights.; Each sheet includes "Key map of plan sheets."; "Printed in 1927."; "19 plans, 1 profile sheet." on shee... U.S. Geological Survey (Washington).
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1927. Geological Survey (U.S.). Relief shown by contours and spot heights.; "Surveyed in 1926."; Index map on each sheet. 46 x 63 centimeters + Scale 1:31,680 General Map Collection. The Survey.
1927. Geological Survey (U.S.). Relief shown by contours and spot heights.; East half--West half.; Surveyed in 1902-1923.; East half 1939 reprint. 217 x 101 centimeters, sheets ea... The Survey (Washington).