Base source: USGS 1:24,000-scale topographic maps compiled 1948-1957; interpretations derived from soil map constructed 1973.; "Projection and 10,000-meter grid ticks, zone 18: Universal Transverse Mercator. 25,000-foot grid ticks based on Maryland coordinate system."; "1-15,763."; Aug. 1979.; Includes location map. 81 x 76 centimeters 1:63,360
Creator:
United States. Soil Conservation Service
Publisher:
Dept. of Agriculture, Soil Conservation Service (Washington.)
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