1934. United States. Works Progress Administration of Pennsylvania. Statement of responsibility: [Works Progress Administration of Pennsylvania]. Relief on most maps shown by contours and spot heights. WPA Project N... Works Progress Administration of Pennsylvania.
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1886. Sanborn Map Company. Conshohocken, Pa., Sep. 1886. 1 map on 7 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1928. Sanborn Map Company. Insurance maps of Conshohocken including Connaughtown, Gulph, Mechanicsville, Spring Mill, West Conshohocken, and parts of Plymouth and Whitemarsh ... Sanborn Map Company.
1917. Sanborn Map Company. Conway, Beaver County, Pennsylvania, November 1916. 1 map on 2 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1898. Sanborn Map Company. Coraopolis, Allegheny Co., Pa., Sept. 1898. 1 map on 4 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1902. Sanborn Map Company. Coraopolis, Allegheny Co., Pa., April 1902. 1 map on 8 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1906. Sanborn Map Company. Coraopolis, Allegheny Co., Pennsylvania, July 1906. 1 map on 12 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1911. Sanborn Map Company. Insurance maps of Coraopolis, Allegheny County, Pennsylvania, June 1911. 1 map on 12 sheets : col. ; sheets 65 x 54 cm. + 1 title sheet. Scale app... Sanborn Map Company.
1924. Sanborn Map Company. Coraopolis, Pennsylvania, Allegheny County, Jan'y 1924. 1 map on 19 sheets : color ; sheets 65 x 54 cm + ; 1 title sheet. Scale approximately 1:60... Sanborn Map Company.
1886. Sanborn Map Company. Corry, Pennsylvania, July 1886. 1 map on 7 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.