BRIEF OHNE UMSCHLAG Jensen, Wilhelm Author: Jensen, Wilhelm Recipient: Haeckel, Ernst Dating: 02.04.1883
BRIEF OHNE UMSCHLAG Jensen, Wilhelm Author: Jensen, Wilhelm Recipient: Haeckel, Ernst Dating: 21.07.1883
BRIEF [O.A.] Jezenzki, St... v. Author: Jezenzki, St... v. Recipient: Haeckel, Ernst Corporation: Die Gartenlaube, Redaction Dating: 28.01.1883
BRIEF [O.A.] Zacharias, Otto Author: Zacharias, Otto Recipient: Haeckel, Ernst Corporation: Zootom. Institut Dating: 07.07.1883
BRIEF [O.A.] Strickland, E... F... Author: Strickland, E... F... Recipient: Haeckel, Ernst Dating: 22.07.1883
