1933. Sanborn Map Company. Seven Valleys, York County, Pennsylvania, Feb. 1933. 1 map : color ; 65 x 54 cm. Scale approximately 1:1,200. 100 ft. to an in. Sanborn Map Company.
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1780. Scale not given; 1 map: color; 20 x 28 cm United States--History--Revolution, 1775-1783--Maps--Early works to 1800.
1895. Sanborn Map Company. Sewickley, Allegheny Co., Pa., May 1895. 1 map on 2 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1900. Sanborn Map Company. Sewickley, Allegheny Co., Pa., Feb. 1900. 1 map on 10 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1911. Sanborn Map Company. Sewickley, Allegheny County, Pennsylvania, May 1911. 1 map on 14 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
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.
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.