Knappen, Russell Stafford (1892-1982) Moulton, Gail Francis (1898-1974) United States of America. Geological Survey.
Thom, William Taylor (1891-1979) Hall, G. M. Wegemann, Carroll Harvey (1879-?) Moulton, Gail Francis (1898-1974) United States of America. Geological Survey.
Fath, Arthur Earl (1887-1976) Moulton, Gail Francis (1898-1974) Stany Zjednoczone. Geological Survey