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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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.
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.
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.
1902. Sanborn Map Company. Donora, Washington Co., Pennsylvania, October 1902. 1 map on 4 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1909. Sanborn Map Company. Donora, Washington County, Pennsylvania, October 1909. 1 map on 9 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1914. Sanborn Map Company. Donora, Washington County, Pennsylvania, November 1914. 1 map on 10 sheets : col. ; sheets 65 x 54 cm. + 1 title sheet. Scale approximately 1:600.... Sanborn Map Company.
1921. Sanborn Map Company. Donora, Washington County, Pennsylvania, September 1921. 1 map on 12 sheets : col. ; sheets 65 x 54 cm. + 1 title sheet. Scale approximately 1:600... Sanborn Map Company.
1929. Sanborn Map Company. Donora, Washington County, Pennsylvania, September 1929. 1 map on 17 sheets : color ; sheets 65 x 54 cm + 1 title sheet. Scale approximately 1:600... Sanborn Map Company.
1886. Sanborn Map Company. Downingtown, PA, Nov. 1886. 1 map on 2 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.