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
BRIEF [O.A.] Wießner, Alexander Author: Wießner, Alexander Recipient: Haeckel, Ernst Dating: 10.12.1876
BRIEF [O.A.] Wießner, Alexander Author: Wießner, Alexander Recipient: Haeckel, Ernst Dating: 10.12.1876
BRIEF [O.A.] Wießner, Alexander Author: Wießner, Alexander Recipient: Haeckel, Ernst Dating: 12.11.1874
BRIEF [O.A.] Wießner, Alexander Author: Wießner, Alexander Recipient: Haeckel, Ernst Dating: 29.10.1874