BRIEF OHNE UMSCHLAG Bölsche, Wilhelm Author: Bölsche, Wilhelm Recipient: Haeckel, Ernst Dating: 03.08.1894
BRIEF OHNE UMSCHLAG Bamberger, Karoline Rosalie Marie Author: Bamberger, Karoline Rosalie Marie Recipient: Haeckel, Ernst Dating: 09.11.1907
BRIEF OHNE UMSCHLAG Angst, Heinrich Author: Angst, Heinrich Recipient: Haeckel, Ernst Corporation: Schweizerisches Landesmuseum, Direktion Dating: 13.12.1899
BRIEF OHNE UMSCHLAG Angst, Heinrich Author: Angst, Heinrich Recipient: Haeckel, Ernst Corporation: Schweizerisches Landesmuseum, Direktion Dating: 06.12.1899
BRIEF OHNE UMSCHLAG Dodel-Port, Arnold Author: Dodel-Port, Arnold Recipient: Haeckel, Ernst Dating: 25.11.1874
BRIEF OHNE UMSCHLAG Dodel-Port, Arnold Author: Dodel-Port, Arnold Recipient: Haeckel, Ernst Dating: 25.12.1874
BRIEF OHNE UMSCHLAG Dodel-Port, Arnold Author: Dodel-Port, Arnold Recipient: Haeckel, Ernst Dating: 07.01.1875
BRIEF OHNE UMSCHLAG Dodel-Port, Arnold Author: Dodel-Port, Arnold Recipient: Haeckel, Ernst Dating: 30.10.1884
BRIEF OHNE UMSCHLAG Dodel-Port, Arnold Author: Dodel-Port, Arnold Recipient: Haeckel, Ernst Dating: 23.02.1885