BRIEF [O.A.] Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 28.08.1911
BRIEF [O.A.] Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 04.09.1911
BRIEF [O.A.] Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 20.10.1911
BRIEF [O.A.] Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 25.10.1911
BRIEF [O.A.] Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 30.10.1911
BRIEF [O.A.] Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 05.11.1911
BRIEF [O.A.] Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 21.11.1911
BRIEF [O.A.] Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 01.12.1911
BRIEF [O.A.] Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 01.01.1912
BRIEF [O.A.] Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 29.01.1912