BRIEF OHNE UMSCHLAG Dodel-Port, Arnold Author: Dodel-Port, Arnold Recipient: Haeckel, Ernst Dating: 30.10.1884
BRIEF OHNE UMSCHLAG Bose, Carl August Graf Author: Bose, Carl August Graf Recipient: Haeckel, Ernst Dating: 15.08.1884
BRIEF OHNE UMSCHLAG Bose, Carl August Graf Author: Bose, Carl August Graf Recipient: Haeckel, Ernst Dating: 07.09.1884
BRIEF OHNE UMSCHLAG Keller, Conrad Author: Keller, Conrad Recipient: Haeckel, Ernst Dating: 06.11.1884