BRIEF [O.A.] Bogdanow, Anatole Author: Bogdanow, Anatole Recipient: Haeckel, Ernst Dating: 27.09.????
BRIEF [O.A.] Bogdanow, Wl... Author: Bogdanow, Wl... Recipient: Haeckel, Ernst Corporation: Société Impériale des Amis d'Histoire Naturelle, d'Anthropologie et d'Ethnographie Dating: 22.12.1913
BRIEF [O.A.] Bogdanow, Wl... Author: Bogdanow, Wl... Recipient: Haeckel, Ernst Corporation: Société Impériale des Amis d'Histoire Naturelle, d'Anthropologie et d'Ethnographie Dating: 08.06.1914
BRIEF [O.A.] Anutschin Author: Anutschin Recipient: Haeckel, Ernst Corporation: Musée d'Anthropologie de l'Université impériale de Moscou Dating: 04.06.1908
BRIEF [O.A.] Bamberger, Johann Author: Bamberger, Johann Recipient: Haeckel, Ernst Dating: 26.02.1916
BRIEF [O.A.] Barchudarian, Johannes Author: Barchudarian, Johannes Recipient: Haeckel, Ernst Dating: 16.12.1897
BRIEF OHNE UMSCHLAG Amburger, Nicolaus Alexander Author: Amburger, Nicolaus Alexander Recipient: Haeckel, Ernst Dating: 28.11.1893