POSTKARTE Köhler, Franz Eugen Author: Köhler, Franz Eugen Recipient: Haeckel, Ernst Dating: 28.03.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 03.03.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 03.05.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 06.05.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 11.05.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 16.05.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 12.05.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 18.05.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 24.05.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 27.05.1905