BRIEF [O.A.] Herzberg, Hans Author: Herzberg, Hans Recipient: Haeckel, Ernst Corporation: Techno-Photographisches Archiv Dating: 31.01.1919
BRIEF OHNE UMSCHLAG Luria, Inés Jost; Luria, Anita Jost Author: Luria, Inés Jost; Luria, Anita Jost Recipient: Haeckel, Ernst Dating: 16.02.1918