BRIEF OHNE UMSCHLAG Stephanitz, Max von Author: Stephanitz, Max von Recipient: Haeckel, Ernst Dating: 26.06.1894
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Palmén, Johan Axel Dating: 09.01.1894
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Palmén, Johan Axel Dating: 20.02.1894
