Kalähne, Alfred (1874-1946)
Brooks, Alfred Hulse (1871-1924) United States of America. Geological Survey.
Deutsche Landwirtschafts-Gesellschaft
Schliepmann, Hans (1855-1929). Editor
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.
Siebenthal, Claude Ellsworth (1869-1930) United States of America. Geological Survey.
Moffit, Fred Howard (1874-1958?) United States of America. Geological Survey.
Mansfield, George Rogers (1875-1947) United States of America. Geological Survey.
Burchard, Ernest Francis (1875-1961) United States of America. Geological Survey.
Knopf, Adolph (1882-1966) United States of America. Geological Survey.
Butler, Bert Sylvenus (1877-1960) Loughlin, Gerald Francis (1880-1946) United States of America. Geological Survey.
Butler, Bert Sylvenus (1877-1960) United States of America. Geological Survey.
Loughlin, Gerald Francis (1880-1946) United States of America. Geological Survey.
Hill, M. J. United States of America. Geological Survey.
Jones, Edward L. United States of America. Geological Survey.
Koenen, Adolf von (1837-1915) Königlich Preussische Geologische Landesanstalt
Königlich Preussische Geologische Landesanstalt
Howell, Ralph W. Wegemann, Carroll Harvey (1879-?) United States of America. Geological Survey.