Topographic map. La Salle, IL 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1913 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. Leonard Mountain, TX 7.5 Quad. (1 : 24000). U.S. Geological Survey: Topographic. Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsTexas.
Topographic map. Linclon, NE 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1897 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsNebraska.
Topographic map. Marathon Gap, TX 7.5 Quad. (1 : 24000). U.S. Geological Survey: Topographic. Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsTexas.
Topographic map. Marion, 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. Marseilles, IL 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1916 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. McAlester, OK 30.0 Quad. (1 : 125000). U.S. Geological Survey: Topographic., 1909 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsOklahoma.
Topographic map. Monmouth, IL 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1923 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. Morris, IL 15.0 Quad. (1 : 62500). U.S. Geological Survey: Topographic., 1918 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. Morrisville, NY 15.0 Quad. (1 : 62500) U.S. Geological Survey: Topographic. 1902 (1948), 1902 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Carl Owen Dunbar Archives, 1914-1979MapsNew York.