Diderot, Denis (1713-1784) Żeleński, Tadeusz (1874-1941). Translator Żeleński, Tadeusz (1874-1941). Preface
Mader, Felix (1867-1941) Lösti, Georg (1859-1943). Photographer Heuwieser, Max (1878-1944). Preface
Mader, Felix (1867-1941) Lösti, Georg (1859-1943). Photographer Heuwieser, Max (1878-1944). Preface
Gurlitt, Cornelius (1850-1938). Editor
Schliepmann, Hans (1855-1929). Editor
Zimmermann, Max Georg (1861-1919). Editor
Deutsche Landwirtschafts-Gesellschaft
Deutsche Landwirtschafts-Gesellschaft
Deutsche Landwirtschafts-Gesellschaft
Schliepmann, Hans (1855-1929). Editor
Astronomisches Rechen-Institut ( Heidelberg). Wislicenus, Walter Friedrich (1859-1905)
Zimmermann, Max Georg (1861-1919). Editor
Wegemann, Carroll Harvey (1879-?) United States of America. Geological Survey.
Bowles, Oliver (1877-1958) United States of America. Geological Survey.
Martin, George Curtis (1875-1943) United States of America. Geological Survey.
Marshall, Robert Bradford (1867-1949) United States of America. Geological Survey.
Pardee, Joseph Thomas (1871-1960) United States of America. Geological Survey.