BRIEF [O.A.] Bimler, Wilh... Author: Bimler, Wilh... Recipient: Haeckel, Ernst Corporation: Jac. Ziegler Dating: 11.12.1885
BRIEF OHNE UMSCHLAG Bermann, Cipri Adolf Author: Bermann, Cipri Adolf Recipient: Haeckel, Ernst Dating: 12.05.1905