Zimmermann, Max Georg (1861-1919). Editor

Karlinger, Hans (1882-1944) Hager, Georg (1863-1941). Editor Lill, Georg (1883-1951). Editor

Trommsdorff, Paul (1870-1940)

Domansky, Walther (1860-1936). Editor Hartwig, Richard. Editor

Bormann, Walter (1888- )

Pożaryski, Mieczysław (1875-1945)

Maupassant, Guy de (1850-1893)

Keilig, Fritz (1889- )

Eckardt, Anton Hefele, Fritz. Preface

Lübke, Wilhelm (1826-1893)

Lübke, Wilhelm (1826-1893) Burckhardt, Jacob (1818-1897). Editor Haupt, Karl Albrecht (1852-1932). Editor

Kalähne, Alfred (1874-1946)

Kalähne, Alfred (1874-1946)

Deutsche Landwirtschafts-Gesellschaft

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.

Smith, George Otis (1871-1944) 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.