BRIEF OHNE UMSCHLAG Sarasin, Fritz; Sarasin, Paul Author: Sarasin, Fritz; Sarasin, Paul Recipient: Haeckel, Ernst Dating: 12.06.1899
BRIEF OHNE UMSCHLAG Schaufenbühl, Friedrich Author: Schaufenbühl, Friedrich Recipient: Haeckel, Ernst Dating: 22.10.1914
BRIEF OHNE UMSCHLAG Friedmann, Hermann Author: Friedmann, Hermann Recipient: Haeckel, Ernst Dating: 19.04.1901
BRIEF OHNE UMSCHLAG Friedmann, Hermann Author: Friedmann, Hermann Recipient: Haeckel, Ernst Dating: 11.06.1901
BRIEF OHNE UMSCHLAG Friedmann, Hermann Author: Friedmann, Hermann Recipient: Haeckel, Ernst Dating: 03.09.1901
BRIEF OHNE UMSCHLAG Friedmann, Hermann Author: Friedmann, Hermann Recipient: Haeckel, Ernst Dating: 25.09.1901
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Rottenburg, Paul von Dating: 20.08.1899
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Rottenburg, Paul von Dating: 16.10.1901
BRIEF OHNE UMSCHLAG Burckhardt, Fritz Author: Burckhardt, Fritz Recipient: Haeckel, Ernst Dating: 16.01.1908
BRIEF OHNE UMSCHLAG Schneider, Gustav Author: Schneider, Gustav Recipient: Haeckel, Ernst Dating: 07.01.1878
