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.
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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.
1898. Sanborn Map Company. Downingtown, Chester Co., PA, June 1898. 1 map on 6 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1903. Sanborn Map Company. Downingtown, Chester County, Pennsylvania, December 1903. 1 map on 8 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1921. Sanborn Map Company. Downingtown, Chester County, Pennsylvania, October 1921. 1 map on 12 sheets : col. ; sheets 65 x 54 cm. + 1 title sheet. Scale approximately 1:600... Sanborn Map Company.
1885. Sanborn Map Company. Doylestown, Penn, June 1885. 1 map : col. ; on sheet 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1891. Sanborn Map Company. Doylestown, Bucks Co., PA, Sept. 1891. 1 map on 2 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.