Pożaryski, Mieczysław (1875-1945)

Keilig, Fritz (1889- )

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.