Map. USGS 15' topographic quadrangle - Elko East, Nevada. Scale 1:62500. Various Pennsylvanian formational contacts are drawn; this map contains no annotated localities., 1953 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Charles A. and June R. P. Ross Archives, 1953-2002…
Map. USGS 15' topographic quadrangle - Empire Mountains - Arizona. Scale 1:62500 - Datum NAD27. Not annotated with localities., 1958 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Charles A. and June R. P. Ross Archives, 1953-2002…
Map. USGS 15' topographic quadrangle - Fort Huachuca - Arizona. Scale 1:62500 - Datum NAD27. Not annotated with localities., 1958 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Charles A. and June R. P. Ross Archives, 1953-2002…
Map. USGS 15' topographic quadrangle - Frenchie Creek, Nevada. Scale 1:62500. Two copies annotated with localities including G-2A through G-2C, 1-A thru 1-C and PN-4038-F., 1957 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Charles A. and June R. P. Ross Archives, 1953-2002…
Map. USGS 15' topographic quadrangle - Garden, Mich. Scale 1:62500. 1958 edition. Not annotated with localities., 1958 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Charles A. and June R. P. Ross Archives, 1953-2002…
Map. USGS 15' topographic quadrangle - Garden Valley, Nevada. Scale 1:62500. Two copies annotated with localities including PN-4025A-F, PN-4026-F and PN-4026B-F., 1949 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Charles A. and June R. P. Ross Archives, 1953-2002…
Map. USGS 15' topographic quadrangle - Gladstone, Mich. Scale 1:62500. 1958 edition. Not annotated with localities., 1958 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Charles A. and June R. P. Ross Archives, 1953-2002…
Map. USGS 15' topographic quadrangle - Gleeson - Arizona. Scale 1:62500 - Datum NAD27. Not annotated with localities., 1958 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Charles A. and June R. P. Ross Archives, 1953-2002…
Map. USGS 15' topographic quadrangle - Happy Valley - Arizona. Scale 1:62500 - Datum NAD27. Not annotated with localities., 1958 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Charles A. and June R. P. Ross Archives, 1953-2002…
Map. USGS 15' topographic quadrangle - Hastings, Minn. - Wis. 1957 edition. Scale: 1:62500. Not annotated with localities., 1957 Bookmark Collection Context Yale University -Yale Peabody Museum of Natural History Charles A. and June R. P. Ross Archives, 1953-2002…