POSTKARTE Kertscher, Herbert R... Author: Kertscher, Herbert R... Recipient: Haeckel, Ernst Dating: 25.12.1913
BRIEF [O.A.] Kertscher, Herbert R... Author: Kertscher, Herbert R... Recipient: Haeckel, Ernst Corporation: Edda Verlag, Berlin Dating: 04.02.1914
BRIEF [O.A.] Kertscher, Herbert R... Author: Kertscher, Herbert R... Recipient: Haeckel, Ernst Corporation: Edda Verlag, Berlin Dating: 27.01.1915
POSTKARTE Thompson, Florence P... Author: Thompson, Florence P... Recipient: Haeckel, Ernst Dating: 04.08.1903
BRIEF OHNE UMSCHLAG Carter, Franklin B. Author: Carter, Franklin B. Recipient: Haeckel, Ernst Dating: 20.04.1894
BRIEF OHNE UMSCHLAG Carter, Franklin B. Author: Carter, Franklin B. Recipient: Haeckel, Ernst Dating: 28.11.1892
BRIEF OHNE UMSCHLAG Carter, Franklin B. Author: Carter, Franklin B. Recipient: Haeckel, Ernst Dating: 05.12.1892