BILDPOSTKARTE Haeckel, Emma Author: Haeckel, Emma Recipient: Haeckel, Ernst; Haeckel, Agnes Dating: 31.12.1908
BILDPOSTKARTE Haeckel, Emma Author: Haeckel, Emma Recipient: Haeckel, Ernst; Haeckel, Agnes Dating: 28.07.1905
BILDPOSTKARTE Haeckel, Emma Author: Haeckel, Emma Recipient: Haeckel, Ernst; Haeckel, Agnes Dating: 06.01.1915