BRIEF [O.A.] Reichardt-Stromberg, Mathilde Author: Reichardt-Stromberg, Mathilde Recipient: Haeckel, Ernst Dating: 04.06.1894
BRIEF [O.A.] Reichardt-Stromberg, Mathilde Author: Reichardt-Stromberg, Mathilde Recipient: Haeckel, Ernst Dating: 08.08.1894
BRIEF [O.A.] Reichardt-Stromberg, Mathilde Author: Reichardt-Stromberg, Mathilde Recipient: Haeckel, Ernst Dating: 27.12.1894