White, David (1862-1935) United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) United States of America. Geological Survey.
Bowen, Charles F. (1871-1953) United States of America. Geological Survey.
Winchester, Dean Eddy (1883-1936) Heald, Kenneth Conrad (1888-1971) United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) United States of America. Geological Survey.
Ross, Clarence Samuel (1880-1975) United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) Bowen, Charles F. (1871-1953) United States of America. Geological Survey.
Goldman, Marcus Isaac (1881-1965) United States of America. Geological Survey.
Robinson, Heath Montgomery Mills, Ronald Van Auken (1881-?) United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) Mather, Kirtley Fletcher (1888-1978) United States of America. Geological Survey.
Robinson, Heath Montgomery Mills, Ronald Van Auken (1881-?) United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) United States of America. Geological Survey.
Winchester, Dean Eddy (1883-1936) United States of America. Geological Survey.
Lloyd, E. Russell (1882-1955) Mather, Kirtley F. (1888-1978) United States of America. Geological Survey.
Bowen, Charles F. (1871-1953) United States of America. Geological Survey.
Ross, Clarence Samuel (1880-1975) United States of America. Geological Survey.
Heald, Kenneth Conrad (1888-1971) Mather, Kirtley Fletcher (1888-1978) United States of America. Geological Survey.
Emery, Wilson Barton (1890-1969) United States of America. Geological Survey.
Hopkins, Oliver Baker United States of America. Geological Survey.
Hopkins, Oliver Baker Powers, Sidney (1890-1932) United States of America. Geological Survey.
Bowen, Charles F. (1871-1953) Roundy, Paul Vere (1884-1937) Ross, Clarence Samuel (1880-1975) Reeves, Frank (1886-1986) United States of America. Geological Survey.
Bowen, Charles F. (1871-1953) United States of America. Geological Survey.