Triangulation diagram, vicinity of Washington, D.C. : October 1958.

Relief shown by contours and spot heights.
Alternate title in upper margin: Washington and vicinity.
Alternate title in lower right margin: Vicinity of Washington, D.C.
"Base map by United States, Department of the Interior, Geological Survey."
State grids.
Accompanied by index: Key to numbered stations, Washington & vicinity triangulation diagram : (revised) 10/58. 2 p. : photocopy ; 27 cm.
Includes notes.
"A-2871-2+."
LC copy laminated, halved, and mounted on cloth backing.
Available also through the Library of Congress Web site as a raster image.
DCP