PORTRÄTPOSTKARTE Friederici, Erna Author: Friederici, Erna Recipient: Haeckel, Ernst Dating: 10.09.1907
BRIEF [O.A.] Wießner, Alexander Author: Wießner, Alexander Recipient: Haeckel, Ernst Dating: 21.11.1874
BRIEF [O.A.] Wießner, Alexander Author: Wießner, Alexander Recipient: Haeckel, Ernst Dating: 28.11.1874
BRIEF [O.A.] Wießner, Alexander Author: Wießner, Alexander Recipient: Haeckel, Ernst Dating: 09.12.1874
BRIEF [O.A.] Wießner, Alexander Author: Wießner, Alexander Recipient: Haeckel, Ernst Dating: 13.12.1874
BRIEF [O.A.] Wießner, Alexander Author: Wießner, Alexander Recipient: Haeckel, Ernst Dating: 28.12.1874
BRIEF [O.A.] Wießner, Alexander Author: Wießner, Alexander Recipient: Haeckel, Ernst Dating: 03.07.1875