Map. USGS 15' topographic quadrangle - Monument Spring, Texas. Scale 1:62500. 1921 edition, reprinted 1946. Mounted on canvas. Annotated with King's Dugout Ck. [Loc. 8094; 1937], 1946 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 - Mountain City, Nevada - Idaho. Scale 1:62500. Annotated with some comments on lithology and dip; annotated with localities including PN 4184p and PN 4185p., 1936 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 - Mount Wrightson - 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 - Mt. Lewis, Nevada. Scale 1:62500. Annotated with Hoare's locality SW/SE/sec35 (circled on map)., 1935 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 - Mt. Lewis, Nevada. Scale 1:62500. Annotated with localities including PN-4039-P through PN-4041-P and PN-4042-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 - Parker Dam, Arizona - California. Scale 1:62500 - Datum NAD27. Not annotated with localities., 1959 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 - Paulden - Arizona. Scale 1:62500 - Datum NAD27. Not annotated with localities., 1947 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 - Payson - Arizona. Scale 1:62500 - Datum NAD27. Not annotated with localities., 1936 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 - Pearce - 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 - Peninsula Point, 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…