1898. Geological Survey (U.S.). Relief shown by contours, hachures, and spot heights.; "Surveyed in 1896-1897."; "R.U. Goode, Geographer in charge. Triangulation by S.S. Gannett. ... U.S. Geological Survey (Washington, D.C).
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1898. Sanborn Map Company. Insurance maps of Warren, Warren County, Pennsylvania, March 1898. 1 map on 17 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft... Sanborn Map Company.