BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Nebuschka, Marie Luise Dating: 19.09.1916
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Nebuschka, Marie Luise Dating: 22.02.1917
BRIEFABSCHRIFT Haeckel, Ernst Author: Haeckel, Ernst Recipient: Nebuschka, Marie Luise Dating: 03.06.1916
BRIEFABSCHRIFT Haeckel, Ernst Author: Haeckel, Ernst Recipient: Nebuschka, Marie Luise Dating: 20.08.1917
BRIEFABSCHRIFT Haeckel, Ernst Author: Haeckel, Ernst Recipient: Nebuschka, Marie Luise Dating: 02.09.1917
ANSICHTSKARTE Haeckel, Ernst Author: Haeckel, Ernst Recipient: Nebuschka, Marie Luise Dating: 14.07.1916
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Nebuschka, Marie Luise Dating: 29.09.1917