POSTKARTE Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 15.06.1913
POSTKARTE Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 29.07.1913
POSTKARTE Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 23.08.1914
POSTKARTE Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 13.06.1916
POSTKARTE Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 09.08.1916
POSTKARTE Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 27.12.1916
POSTKARTE Flothuis, M... H... Author: Flothuis, M... H... Recipient: Haeckel, Ernst Dating: 02.03.1917