1916. Pennsylvania. Bureau of Topographic and Geologic Survey. "Richard R. Hice, State Geologist."; Contour interval 100 feet.; Originally published as part of Oil and gas map of southwestern Pennsylvania, 1915... The Survey (Pennsylvania).
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1869. Sheafer, P. W. (Peter Wenrick), 1819-. Shows railroads and canals, coal and oil regions and locations of steel works, foundries etc. from Lake Ontario through much of West Virginia; most... Jacob Haehnlen [lithographer (Philadelphia, [Pennsylvania).
1929. Pennsylvania. Public Service Commission. Insets: Pittsburgh and vicinity. Scale 1:190 080 ; Philadelphia and vicinity. Scale 1:190 080.; Includes color-keyed index to steam railroads and i... The Commission (Harrisburg, Pa).