Topographic map. Lake Brownwood,TX 7.5 Quad. (1 : 24000). U.S. Geological Survey, 1969 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History David E. Schindel Archives, 1958-1972Maps, 1958-19721967-1969.
Topographic map. Mineral City, OH 7.5 Quad. (1 : 24000). U.S. Geological Survey: Topographic., 1961 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History David E. Schindel Archives, 1958-1972Maps, 1958-19721961-1963.
Topographic map. Mineral Wells,TX 15 Quad. (1 : 62500). U.S. Geological Survey, 1959 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History David E. Schindel Archives, 1958-1972Maps, 1958-19721958-1960.
Topographic map. Navarre, OH 15 Quad. (1 : 62500) USGS Topographic Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History David E. Schindel Archives, 1958-1972Maps, 1958-1972Not Dated.
Topographic map. Necessity,TX 7.5 Quad. (1 : 2400). U.S. Geological Survey, 1967 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History David E. Schindel Archives, 1958-1972Maps, 1958-19721967-1969.
Topographic map. Palo Pinto,TX 15 Quad. (1 : 62500). U.S. Geological Survey, 1958 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History David E. Schindel Archives, 1958-1972Maps, 1958-19721958-1960.
Topographic map. South Bend,TX 7.5 Quad. (1 : 24000). U.S. Geological Survey, 1967 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History David E. Schindel Archives, 1958-1972Maps, 1958-19721967-1969.
Topographic map. Sugarcreek, OH 7.5 Quad. (1 : 24,000) USGS topographic, 1961 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History David E. Schindel Archives, 1958-1972Maps, 1958-19721961-1963.
Topographic map. Wayland,TX 7.5 Quad. (1 : 24000). U.S. Geological Survey, 1967 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History David E. Schindel Archives, 1958-1972Maps, 1958-19721967-1969.