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BRIEF [O.A.]
Köster, Rudolf
Author:
Köster, Rudolf
Recipient:
Haeckel, Ernst
Dating:
07.12.1917
BRIEF [O.A.]
Köster, Rudolf
Author:
Köster, Rudolf
Recipient:
Haeckel, Ernst
Dating:
30.12.1917
BRIEF [O.A.]
Köster, Rudolf
Author:
Köster, Rudolf
Recipient:
Haeckel, Ernst
Dating:
14.06.1918
BRIEF [O.A.]
Köster, Rudolf
Author:
Köster, Rudolf
Recipient:
Haeckel, Ernst
Dating:
18.07.1919
BRIEF [O.A.]
Martin, Alfred
Author:
Martin, Alfred
Recipient:
Haeckel, Ernst
Dating:
13.12.1899
BRIEF [O.A.]
Wiebach, Hans
Author:
Wiebach, Hans
Recipient:
Haeckel, Ernst
Dating:
19.01.1915
BRIEF [O.A.]
Wiebach, Hans
Author:
Wiebach, Hans
Recipient:
Haeckel, Ernst
Dating:
15.02.1912
BRIEF [O.A.]
Wiebach, Hans
Author:
Wiebach, Hans
Recipient:
Haeckel, Ernst
Dating:
22.01.1911
BRIEF [O.A.]
Wiebach, Hans
Author:
Wiebach, Hans
Recipient:
Haeckel, Ernst
Dating:
18.01.1911
BRIEF [O.A.]
Zacharias, Otto
Author:
Zacharias, Otto
Recipient:
Haeckel, Ernst
Dating:
02.10.1875
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