BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: An die Freunde in Jena Dating: 27.01.1867
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: An die Freunde in Jena Dating: 12.11.1866
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: An die Freunde in Jena Dating: 27.11.1866
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: An die Freunde in Jena Dating: 09.12.1866
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: An die Freunde in Jena Dating: 17.12.1866
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: An die Freunde in Jena Dating: 08.01.1867
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: An die Freunde in Jena Dating: 16.02.1867
BRIEFENTWURF Haeckel, Ernst Author: Haeckel, Ernst Recipient: An die Freunde in Jena Dating: 18.03.1867
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: An die Freunde in Jena Dating: 18.03.1867
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: An die Freunde in Jena Dating: 30.03.1867