POSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Hintze [Altwein], Wilhelmine Dating: 06.09.1911
POSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Hintze [Altwein], Wilhelmine Dating: 11.06.1912
POSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Hintze [Altwein], Wilhelmine Dating: 02.08.1906
POSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Hintze [Altwein], Wilhelmine Dating: 20.02.1915
POSTKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Hintze [Altwein], Wilhelmine Dating: 29.06.1907