United States Geological Survey.

Capps, Stephen R. (1881-1949) Stany Zjednoczone. Geological Survey

Reed, John C. (1905-1993) Stany Zjednoczone. Geological Survey

Mertie, John Beaver (1888-1980) Stany Zjednoczone. Geological Survey

Moffit, Fred H. (1874-1958?) Stany Zjednoczone. Geological Survey

Callaghan, Eugene (1904-1990) Stany Zjednoczone. Geological Survey

United States Geological Survey.

Bass, N. Wood (1893-1979) Dillard, W. Reese Hengst, Jess H. Stany Zjednoczone. Geological Survey

Moffit, Fred H. (1874-1958?) Stany Zjednoczone. Geological Survey

United States Geological Survey.

Perry, John Howard (1895-1953). Red.