Washington folio, District of Columbia-Maryland-Virginia.
Geological Survey (U.S.)
Washington, D.C. : U.S. Geological Survey,
1901.
Relief shown by contours and spot heights.
Cover title.
Plates: [1] Topographic sheet, Washington quadrangle -- [2] Historical geology sheet, Washington quadrangle -- [3] Economic geology sheet, Washington quadrangle -- [4] Structure section sheet, Washington quadrangle -- [5] Physiographic geology sheet, Washington quadrangle
Location map on cover.
Text and ill. on inside covers.