Title in lower margin: Kennebec Co., Me. : N4406--W6921.5/38x47, 1978. "Compiled in 1978 from USGS 1:24,000 and 1:62,500-scale topographic maps dated 1956-1970." "Planimetry revised from aerial photographs taken 1976-1977 and other source data." "1-13507." Available also through the Library of Congress Web site as a raster image.
United States. Soil Conservation Service; Geological Survey, (U.S.)
1978
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