Smith, Philip Sidney (1877-1949) United States of America. Geological Survey.
Capps, Stephen Reid (1881-1949) United States of America. Geological Survey.
Marshall, Robert Bradford (1867-1949) United States of America. Geological Survey.
Moffit, Fred Howard (1874-1958?) United States of America. Geological Survey.
Mertie, John Beaver (1888-1980) Waters, A. E. Jr. United States of America. Geological Survey.