BRIEF [O.A.] Kantorowicz, S... Author: Kantorowicz, S... Recipient: Haeckel, Ernst Dating: 11.06.1892
BRIEF [O.A.] Krauseneck, Valentine Author: Krauseneck, Valentine Recipient: Haeckel, Ernst Dating: 10.05.1892
BRIEF [O.A.] Krauseneck, Heinrich Author: Krauseneck, Heinrich Recipient: Haeckel, Ernst Dating: 16.07.1892
BRIEF [O.A.] Krauseneck, Heinrich Author: Krauseneck, Heinrich Recipient: Haeckel, Ernst Dating: 19.09.1892
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