BRIEF OHNE UMSCHLAG Engelmann, Emma Author: Engelmann, Emma Recipient: Haeckel, Ernst Dating: 16.10.1891
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 15.12.1891
BRIEF OHNE UMSCHLAG Engelmann, Emma Author: Engelmann, Emma Recipient: Haeckel, Ernst Dating: 18.11.1893
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 15.02.1894
BRIEF OHNE UMSCHLAG Engelmann, Theodor Wilhelm Author: Engelmann, Theodor Wilhelm Recipient: Haeckel, Ernst Dating: 24.03.1894
BRIEF OHNE UMSCHLAG Greshoff, Maurits Author: Greshoff, Maurits Recipient: Haeckel, Ernst Corporation: Koloniaal Museum Haarlem Dating: 25.11.1901
BRIEF [O.A.] Franken, O... D... Author: Franken, O... D... Recipient: Haeckel, Ernst Dating: 18.04.1907
BRIEF OHNE UMSCHLAG Fürbringer, Max Author: Fürbringer, Max Recipient: Haeckel, Ernst Dating: 04.06.1882
BRIEF OHNE UMSCHLAG Fürbringer, Max Author: Fürbringer, Max Recipient: Haeckel, Ernst Dating: 05.01.1888
BRIEF OHNE UMSCHLAG Fürbringer, Max Author: Fürbringer, Max Recipient: Haeckel, Ernst Dating: 09.03.1888