Collier, Arthur James (1866-1939) United States of America. Geological Survey.
Dobbin, Carroll Edward (1892-1967) Stany Zjednoczone. Geological Survey
Hoots, Harold William (1899-1979) Stany Zjednoczone. Geological Survey
Hancock, Eugene Thomas (1875-?) Eby, James Brian (1896-?) Stany Zjednoczone. Geological Survey