Relief shown by contours and spot heights. Panel title. "Compiled by the D.C. Department of Corrections, Lorton, Virginia, under the technical direction of the Topographic Division, USGS, from 1976 aerial photographs. Field checked by USGS 1979. Map edited 1979." "Projection and 100-meter grid: Universal transverse Mercator, zone 18." Includes location map. Text and col. ill. on verso. Available also through the Library of Congress Web site as a raster image.
Geological Survey (U.S.)
1979
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