BRIEF [O.A.] Hübner, Marie Author: Hübner, Marie Recipient: Haeckel, Ernst Corporation: Städtisches Schulmuseum in Breslau I. Dating: 04.11.1906
BRIEF [O.A.] Hübner, Marie Author: Hübner, Marie Recipient: Haeckel, Ernst Corporation: Städtisches Schulmuseum in Breslau I. Dating: 02.12.1906