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.
1917. Sanborn Map Company. Irvona, Clearfield County, Pennsylvania, October 1917. 1 map on 2 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. u... Sanborn Map Company.
1884. Sanborn Map Company. Irwin, Penn., June 1884. 1 map on 2 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1889. Sanborn Map Company. Irwin, Westmoreland County, Pa., Oct. 1889. 1 map on 3 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1894. Sanborn Map Company. Irwin, Westmoreland Co., Pennsylavnia, May, 1894. 1 map on 7 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1899. Sanborn Map Company. Irwin, Westmoreland Co., Pa., Sept., 1899. 1 map on 6 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1904. Sanborn Map Company. Irwin, Westmoreland Co., Pennsylvania, July 1904. 1 map on 6 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1909. Sanborn Map Company. Irwin, Westmoreland Co., Pennsylvania, September 1909. 1 map on 6 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1919. Sanborn Map Company. Irwin, including North, East and West Irwin, Westmoreland County, Pennsylvania, Nov. 1919. 1 map on 12 sheets : col. ; sheets 65 x 54 cm. Scale ap... Sanborn Map Company.