BRIEF [O.A.] Neumann, Carl W... Author: Neumann, Carl W... Recipient: Haeckel, Ernst Dating: 10.03.1919
BRIEF [O.A.] Neumann, Carl W... Author: Neumann, Carl W... Recipient: Haeckel, Ernst Dating: 18.12.1908
BRIEF [O.A.] Neumann, Carl W... Author: Neumann, Carl W... Recipient: Haeckel, Ernst Dating: 09.01.1909
BRIEF [O.A.] Neumann, Carl W... Author: Neumann, Carl W... Recipient: Haeckel, Ernst Dating: 22.01.1909
BRIEF [O.A.] Neumann, Carl W... Author: Neumann, Carl W... Recipient: Haeckel, Ernst Dating: 03.02.1909
BRIEF [O.A.] Neumann, Carl W... Author: Neumann, Carl W... Recipient: Haeckel, Ernst Dating: 13.04.1909
BRIEF [O.A.] Neumann, Carl W... Author: Neumann, Carl W... Recipient: Haeckel, Ernst Dating: 11.12.1910
BRIEF [O.A.] Neumann, Carl W... Author: Neumann, Carl W... Recipient: Haeckel, Ernst Dating: 17.05.1911
BRIEF [O.A.] Neumann, Carl W... Author: Neumann, Carl W... Recipient: Haeckel, Ernst Dating: 10.08.1919
BRIEF [O.A.] Neumann, Carl W... Author: Neumann, Carl W... Recipient: Haeckel, Ernst Dating: 22.09.1911