Topographic map. Trout Run, PA 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1923 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Hugo R. Greiner Archives, 1885-1941Maps, 1895-19411921-1930.
Topographic map. Troy, PA 15.0 Quad. (1 : 62500) U.S. Geological Survey: Topographic (Advance Sheet). [Volume=YPM.06342; IP.07413], 1926 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Hugo R. Greiner Archives, 1885-1941Maps, 1895-19411921-1930.
Topographic map. Union City, PA-NY 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic. 1932 (1944), 1932 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Hugo R. Greiner Archives, 1885-1941Maps, 1895-19411931-1940.
Topographic map. Warren, PA-NY 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1906 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Hugo R. Greiner Archives, 1885-1941Maps, 1895-19411895-1910.
Topographic map. Warren, PA-NY 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic. 1908 (1921), 1908 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Hugo R. Greiner Archives, 1885-1941Maps, 1895-19411895-1910.
Topographic map. Wellsville, NY 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic. 1926 (1948), 1926 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Hugo R. Greiner Archives, 1885-1941Maps, 1895-19411921-1930.
Topographic map. Woodhull, NY 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic. 1926 (1944), 1926 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Hugo R. Greiner Archives, 1885-1941Maps, 1895-19411921-1930.
Topographic map. Woodhull, PA 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic (Advance Sheet)., 1931 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Hugo R. Greiner Archives, 1885-1941Maps, 1895-19411931-1940.
Topographic map. Youngsville, PA-NY 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic. 1929 (1945), 1929 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Hugo R. Greiner Archives, 1885-1941Maps, 1895-19411921-1930.