Bass, N. Wood (1893-1979) Kennedy L. E. Dillard, W. Reese Leatherock, Otto Hengst, Jess H. United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) United States of America. Geological Survey.
Bowen, Charles F. (1871-1953) United States of America. Geological Survey.
Bowen, Charles F. (1871-1953) United States of America. Geological Survey.
Winchester, Dean Eddy (1883-1936) Heald, Kenneth Conrad (1888-1971) United States of America. Geological Survey.
White, David (1862-1935) United States of America. Geological Survey.
Clark, Frank Rinker (1881-1974) United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) United States of America. Geological Survey.
Ross, Clarence Samuel (1880-1975) United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) Bowen, Charles F. (1871-1953) United States of America. Geological Survey.
Ross, Clarence Samuel (1880-1975) United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) Mather, Kirtley Fletcher (1888-1978) United States of America. Geological Survey.
Parker, Frank Stephen (1905-1984) United States of America. Geological Survey.
Pardee, Joseph Thomas (1871-1960) United States of America. Geological Survey.
Goldman, Marcus Isaac (1881-1965) United States of America. Geological Survey.
Robinson, Heath Montgomery Mills, Ronald Van Auken (1881-?) United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) Mather, Kirtley Fletcher (1888-1978) United States of America. Geological Survey.
Bowen, Charles F. (1871-1953) Roundy, Paul Vere (1884-1937) Ross, Clarence Samuel (1880-1975) Reeves, Frank (1886-1986) United States of America. Geological Survey.
Robinson, Heath Montgomery Mills, Ronald Van Auken (1881-?) United States of America. Geological Survey.
Shaw, Eugene Wesley (1881-1935) Matson, George Charlton (1873-?) Wegemann, Carroll Harvey (1879-?) United States of America. Geological Survey.
Shaw, Eugene Wesley (1881-1935) United States of America. Geological Survey.
Capps, Stephen Reid (1881-1949) United States of America. Geological Survey.
Shaw, Eugene Wesley (1881-1935) Kirtley, F. Mather (1888-1978) United States of America. Geological Survey.
Bowen, Charles F. (1871-1953) United States of America. Geological Survey.