BRIEF OHNE UMSCHLAG Rosenthal, Eduard Author: Rosenthal, Eduard Recipient: Schmidt, Heinrich Dating: 05.11.1919
BRIEF [O.A.] Rosenthal, Eduard Author: Rosenthal, Eduard Recipient: Heilborn, Adolf Dating: 27.11.1919
BRIEF [O.A.] Rosenthal, Eduard Author: Rosenthal, Eduard Recipient: Haeckel, Ernst Dating: 10.08.1919