Bradley, Harry Cyrus (1871-1936) Uhler, Eugene Henry (1884- )
Siegert, Helmut
Kloeppel, Otto (1873-1942)
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United States of America. Geological Survey. Ayvazoglou, W. (1871-1956). Editor
Thom, Emma Mertins United States of America. Geological Survey.
Currier L. W. (1890-1970) United States of America. Geological Survey.
United States of America. Geological Survey. Ayvazoglou, W. (1871-1956). Editor
Staack, J. G. (1878- ) United States of America. Geological Survey.
Staack, J. G. (1878- ) United States of America. Geological Survey.
Staack, J. G. (1878- ) United States of America. Geological Survey.
Vanderwilt, John W. (1898-1992) United States of America. Geological Survey.
Pierce, William Gamewell (1904-1994) Hunt, Charles Butler (1906-1997) United States of America. Geological Survey.
Hendricks, Thomas Andrews (1907-1985) United States of America. Geological Survey.
Krzyszkowski, Wacław. Editor