Public buildings and public parks in the District of Columbia : under the jurisdiction of the director
Also shows reservoirs, water pumping stations, powerplants, electric substations, gas plants, police stations and precinct boundaries, telephone and telegraph offices, railroad stations and yards, R.O.T.C., National Guard, and Marine installations in red overprint. Oriented with north toward the upper left. "J.P.S. Nov. 1931." "File no. 7-49." "10250." LC copy rubber-stamped, laminated, halved, and mounted on cloth backing. Available also through the Library of Congress ...
United States. Office of Public Buildings and Public Parks of the National Capital
The Alaska Line.
Available also through the Library of Congress web site as a raster image.