Schaller, Waldemar Theodore (1882-1967) United States of America. Geological Survey.
Schaller, Waldemar Theodore (1882-1967) United States of America. Geological Survey.
Schaller, Waldemar Theodore (1882-1967) United States of America. Geological Survey.
Schaller, Waldemar Theodore (1882-1967) Henderson, Edward Porter (1898- ) United States of America. Geological Survey.
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) United States of America. Geological Survey.