Schrader, Frank Charles (1860-1944) United States of America. Geological Survey.
Parker, Frank Stephen (1905-1984) United States of America. Geological Survey.
Pardee, Joseph Thomas (1871-1960) United States of America. Geological Survey.
Pierce, William Gamewell (1904-1994) United States of America. Geological Survey.
Hendricks, Thomas Andrews (1907-1985) United States of America. Geological Survey.
Pierce, William Gamewell (1904-1994) Hunt, Charles Butler (1906-1997) United States of America. Geological Survey.