BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 19.01.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 24.12.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 31.12.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 28.01.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 08.03.1905
BRIEF [O.A.] Koehler, Woldemar Author: Koehler, Woldemar Recipient: Haeckel, Ernst Dating: 22.03.1905
BRIEF [O.A.] Köhler, Franz Eugen Author: Köhler, Franz Eugen Recipient: Haeckel, Ernst Dating: 25.03.1905
POSTKARTE Köhler, Franz Eugen Author: Köhler, Franz Eugen Recipient: Haeckel, Ernst Dating: 25.03.1905