BRIEF [O.A.] Reichardt-Stromberg, Mathilde Author: Reichardt-Stromberg, Mathilde Recipient: Haeckel, Ernst Dating: 21.03.1893
BRIEF [O.A.] Reichardt-Stromberg, Mathilde Author: Reichardt-Stromberg, Mathilde Recipient: Haeckel, Ernst Dating: 24.04.1893