Topographic map. Hamilton, NY 7.5 Quad. (1 : 25000). U.S. Geological Surrvey.: Topographic., 1949 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsNew York.
Topographic map. Harrisburg, IL 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1925 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsIllinois. Maps of Illinois, a few show bordering states.
Topographic map. Hartwick, NY 15.0 Quad. (1 : 62500) U.S. Geological Survey: Topographic., 1910 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsNew York.
Topographic map. Havana, IL 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1925 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsIllinois. Maps of Illinois, a few show bordering states.
Topographic map. Herrin, IL 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1910 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsIllinois. Maps of Illinois, a few show bordering states.
Topographic map. Howe, NE 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1915 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsNebraska.
Topographic map. Hubbardsville, NY 7.5 Quad. (1 : 25000). U.S. Geological Surrvey.: Topographic., 1949 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsNew York.
Topographic map. Humbolt, NE 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1915 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsNebraska.
Topographic map. Humbolt, NE 15 Quad (1 : 125000), U.S. Geological Survey, topographic., 1916 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsNebraska.
Topographic map. Kaaterskill, NY 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic. 1903 (1932), 1903 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsNew York.