Kalähne, Alfred (1874-1946)
Deutsche Landwirtschafts-Gesellschaft
Howell, Ralph W. Wegemann, Carroll Harvey (1879-?) United States of America. Geological Survey.
Lesher, Carl Eugene (1885-?) United States of America. Geological Survey.
Wegemann, Carroll Harvey (1879-?) Heald, Kenneth Conrad (1888-1971) United States of America. Geological Survey.
Wegemann, Carroll Harvey (1879-?) United States of America. Geological Survey.
Wegemann, Carroll Harvey (1879-?) United States of America. Geological Survey.
Wegemann, Carroll Harvey (1879-?) United States of America. Geological Survey.
Anderson, Robert Pack, Robert W. (1885-?) United States of America. Geological Survey.
Capps, Stephen Reid (1881-1949) Johnson, Bertrand Leroy (1882-?) United States of America. Geological Survey.
Matson, George Charlton (1873-?) United States of America. Geological Survey.
Capps, Stephen Reid (1881-1949) United States of America. Geological Survey.
Brooks, Alfred Hulse (1871-1924) United States of America. Geological Survey.
Königlich Preussische Geologische Landesanstalt
Knopf, Adolph (1882-1966) United States of America. Geological Survey.
Mansfield, George Rogers (1875-1947) United States of America. Geological Survey.
Knopf, Adolph (1882-1966) United States of America. Geological Survey.
Jones, Edward L. United States of America. Geological Survey.
Burchard, Ernest Francis (1875-1961) United States of America. Geological Survey.
Ransome, Frederick Leslie (1868-1935) United States of America. Geological Survey.
Burchard, Ernest Francis (1875-1961) United States of America. Geological Survey.
Butler, Bert Sylvenus (1877-1960) Loughlin, Gerald Francis (1880-1946) United States of America. Geological Survey.