Hewett, D. F. (1881-?) Callaghan, Eugene (1904-1990) Moore, B. N. Nolan, Thomas Brennan (1901-1992) Rubey, William Walden (1898-1974) Schaller, Waldemar Theodore (1882-1967) Stany Zjednoczone. Geological Survey
Rubey, William Walden (1898-1974) Stany Zjednoczone. Geological Survey