POSTKARTE Schemmell, Lucie Nat... Author: Schemmell, Lucie Nat... Recipient: Haeckel, Ernst Dating: 03.02.1909
POSTKARTE Schemmell, Lucie Nat... Author: Schemmell, Lucie Nat... Recipient: Haeckel, Ernst Dating: 09.02.1909
BRIEF [O.A.] Möller, Ludwig Author: Möller, Ludwig Recipient: Haeckel, Ernst Corporation: Möllers Deutsche Gärtner-Zeitung Dating: 21.07.1892
BRIEF [O.A.] Möller, Ludwig Author: Möller, Ludwig Recipient: Haeckel, Ernst Corporation: Möllers Deutsche Gärtner-Zeitung Dating: 23.07.1892