Diderot, Denis (1713-1784) Żeleński, Tadeusz (1874-1941). Translator Żeleński, Tadeusz (1874-1941). Preface
Lübke, Wilhelm (1826-1893) Burckhardt, Jacob (1818-1897). Editor Haupt, Karl Albrecht (1852-1932). Editor
Kegel, Wilhelm (1890-1971) Königlich Preussische Geologische Landesanstalt
Wedekind, Rudolf (1883-1961) Königlich Preussische Geologische Landesanstalt
Spencer, Arthur Coe (1871-1964) United States of America. Geological Survey.
Winchester, Dean Eddy (1883-1936) Hares, Charles Joseph (1881-?) Lloyd Russell E. Parks, E. M. United States of America. Geological Survey.
Shaw, Eugene Wesley (1881-1935) Matson, George Charlton (1873-?) Wegemann, Carroll Harvey (1879-?) United States of America. Geological Survey.
Schrader, Frank Charles (1860-1944) Stone, Ralph Walter (1876-1964) Sanford, Samuel (1865-1927) United States of America. Geological Survey.
Butler, Bert Sylvenus (1877-1960) Gale, Hoyt Stoddard (1876-1952) United States of America. Geological Survey.
Schaller, Waldemar Theodore (1882-1967) United States of America. Geological Survey.
Wegemann, Carroll Harvey (1879-?) United States of America. Geological Survey.
Hess, Frank Lee (1871-1955) United States of America. Geological Survey.
Caspary, Robert (1818-1887) Königlich Preussische Geologische Landesanstalt
Becker, Gustav (1882- )