UMSCHLAG Darling, Ernest Willing Author: Darling, Ernest Willing Recipient: Haeckel, Ernst Dating: 26.04.1914
UMSCHLAG Darling, Ernest Willing Author: Darling, Ernest Willing Recipient: Haeckel, Ernst Dating: 15.05.??
UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Sachs, Jules Corporation: Zoologisches Institut der Universität Jena
UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Sachs, Jules Corporation: Zoologisches Institut
UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Sachs, Jules Corporation: Zoologisches Institut der Universität Jena
UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Dieterich, Alfred Corporation: Zoologisches Institut der Universität Jena Dating: 01.10.1909