Winchester, Dean Eddy (1883-1936) United States of America. Geological Survey.
Spencer, Arthur Coe (1871-1964) United States of America. Geological Survey.
Winchester, Dean Eddy (1883-1936) Hares, Charles Joseph (1881-?) Lloyd Russell E. Parks, E. M. 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.
Schrader, Frank Charles (1860-1944) Stone, Ralph Walter (1876-1964) Sanford, Samuel (1865-1927) United States of America. Geological Survey.
Butler, Bert Sylvenus (1877-1960) Gale, Hoyt Stoddard (1876-1952) United States of America. Geological Survey.
Schaller, Waldemar Theodore (1882-1967) United States of America. Geological Survey.
Wegemann, Carroll Harvey (1879-?) United States of America. Geological Survey.
Hess, Frank Lee (1871-1955) United States of America. Geological Survey.
Condit, Daniel Dale (1886-?) United States of America. Geological Survey.
English, Walter A. United States of America. Geological Survey.
Condit, Daniel Dale (1886-?) United States of America. Geological Survey.
Mansfield, George Rogers (1875-1947) United States of America. Geological Survey.
Lee, Willis Thomas (1864-1926) United States of America. Geological Survey.
Ransome, Frederick Leslie (1868-1935) Gale, Hoyt Stoddard (1876-1952) United States of America. Geological Survey.
Lupton, Charles Thomas (1878-1935) United States of America. Geological Survey.
Stebinger, Eugene (1883-1951) United States of America. Geological Survey.
Gale, Hoyt Stoddard (1876-1952) United States of America. Geological Survey.
Smith, George Otis (1871-1944) United States of America. Geological Survey.
Capps, Stephen Reid (1881-1949) Johnson, Bertrand Leroy (1882-?) United States of America. Geological Survey.
Capps, Stephen Reid (1881-1949) United States of America. Geological Survey.
Siebenthal, Claude Ellsworth (1869-1930) United States of America. Geological Survey.
Munn, Malcolm John (1874-1949) United States of America. Geological Survey.
Nickles, John Milton (1859-1945) United States of America. Geological Survey.