Winchester, Dean Eddy (1883-1936) United States of America. Geological Survey.
Spencer, Arthur Coe (1871-1964) United States of America. Geological Survey.
Emmons, William Harvey (1876-1948) United States of America. Geological Survey.
Lupton, Charles Thomas (1878-1935) 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.
Capps, Stephen R. (1881-1949) 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.
Marshall, Robert Bradford (1867-1949) United States of America. Geological Survey.
Eakin, Henry Miner (1883-1936) 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.
Brooks, Alfred Hulse (1871-1924) United States of America. Geological Survey.
Marshall, Robert Bradford (1867-1949) United States of America. Geological Survey.
Marshall, Robert Bradford (1867-1949) United States of America. Geological Survey.
Marshall, Robert Bradford (1867-1949) United States of America. Geological Survey.
Gale, Hoyt Stoddard (1876-1952) United States of America. Geological Survey.
Brooks, Alfred Hulse (1871-1924) United States of America. Geological Survey.
Hess, Frank Lee (1871-1955) United States of America. Geological Survey.
Marshall, Robert Bradford (1867-1949) United States of America. Geological Survey.
Rogers, Gaillard Sherburne (1889-1919) United States of America. Geological Survey.
Woolsey, Lester Hood (1877-1961) Richards, Ralph Webster (1879-?) Lupton, Charles Thomas (1878-1935) United States of America. Geological Survey.
Marshall, Robert Bradford (1867-1949) United States of America. Geological Survey.
Butler, Bert Sylvenus (1877-1960) Heikes, Victor Conrad(1867-1948) United States of America. Geological Survey.
Jones, Edward L. United States of America. Geological Survey.