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. Knoxville, Pa., Jan. 1886. 1 map on 2 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1891. Sanborn Map Company. Knoxville, Tioga Co., Pa., Oct. 1891. 1 map on 2 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1893. Sanborn Map Company. Knoxville Borough, Allegheny County, Penna. including Beltzhoover and Mt. Oliver, Oct. 1893. 1 map on 10 sheets : col. ; sheets 65 x 54 cm. Scale ... Sanborn Map Company.
1897. Sanborn Map Company. Knoxville, Tioga Co., Pa., Nov. 1897. 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. Knoxville Borough, Allegheny Co., Pa., Aug. 1898. 1 map on 8 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1903. Sanborn Map Company. Knoxville, Tioga Co., Pennsylvania, September 1903. 1 map on 3 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1911. Sanborn Map Company. Knoxville, Tioga County, Pennsylvania, April 1911. 1 map on 4 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1922. Sanborn Map Company. Knoxville, Tioga County, Pennsylvania, May 1922. 1 map on 5 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1923. Sanborn Map Company. Koppel, Beaver County, Pennsylvania, July 1923. 1 map on 3 sheets : color ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. unless ... Sanborn Map Company.