Meinzer, Oscar Edward (1876-1948) United States of America. Geological Survey.
Winchester, Dean Eddy (1883-1936) 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.
Lupton, Charles Thomas (1878-1935) United States of America. Geological Survey.
Stebinger, Eugene (1883-1951) 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.
Lupton, Charles Thomas (1878-1935) Condit, Daniel Dale (1886-?) United States of America. Geological Survey.
Ferguson, Henry Gardiner(1882-1966) United States of America. Geological Survey.
Bastin, Edson Sunderland (1878-1953) United States of America. Geological Survey.
Knopf, Adolph (1882-1966) United States of America. Geological Survey.
Pardee, Joseph Thomas (1871-1960) United States of America. Geological Survey.
Calkins, Frank Cathcart United States of America. Geological Survey.
Pardee, Joseph Thomas (1871-1960) United States of America. Geological Survey.
Pardee, Joseph Thomas (1871-1960) United States of America. Geological Survey.
Beal, Carl Hugh (1889-1946) United States of America. Geological Survey.
Bagley, James Warren (1881-1947) United States of America. Geological Survey.
Harder, Edmund Cecil (1882-?) Johnston, A. W. United States of America. Geological Survey.
Ashley, George Hall (1866-1951) United States of America. Geological Survey.
Miser, Hugh Dinsmore (1884-1969) United States of America. Geological Survey.
Ashley, George Hall (1866-1951) Hicks, William Brooks (1882-?) Bailey, Reginald K. United States of America. Geological Survey.
Matson, George Charlton (1873-?) United States of America. Geological Survey.