BRIEF OHNE UMSCHLAG Schubert, Adolph Author: Schubert, Adolph Recipient: Haeckel, Carl Gottlob Dating: 09.12.1852
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Carl Gottlob Dating: 05.12.1852
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Carl Gottlob Dating: 19.11.1852