Ross, Clarence Samuel (1880-1975) Stany Zjednoczone. Geological Survey
Matson, George Charlton (1873-?) Hopkins, Oliver Baker Stany Zjednoczone. Geological Survey
Hopkins, Oliver Baker Stany Zjednoczone. Geological Survey
Shaw, Eugene Wesley (1881-1935) Ports, P. L. Stany Zjednoczone. Geological Survey
Shaw, Eugene Wesley ( 1881-1935) Matson, George Charlton (1873-?) Wegemann, Carroll Harvey (1879-?) Stany Zjednoczone. Geological Survey
Eckel, Edwin Butt (1906-1989) United States of America. Geological Survey.
Fenneman, Nevin Melancthon (1865-1945) Stany Zjednoczone. Geological Survey
Staack, J. G. (1878- ) United States of America. Geological Survey.
Matson, George Charlton (1873-?) United States of America. Geological Survey.
Trowbridge, Arthur Carleton (1885-?) United States of America. Geological Survey.
Burchard, Ernest Francis (1875-1961) United States of America. Geological Survey.
Schaller, Waldemar Theodore (1882-1967) Henderson, Edward Porter (1898- ) United States of America. Geological Survey.
Hoots, Harold William (1899-1979) Stany Zjednoczone. Geological Survey