BRIEF [O.A.] Graullot, Bustarrd Author: Graullot, Bustarrd Recipient: Haeckel, Ernst Dating: 08.01.1906
BRIEF [O.A.] Hachet-Souplet, M... Pierre Author: Hachet-Souplet, M... Pierre Recipient: Haeckel, Ernst Corporation: Institut de Psychologie Zoologique Dating: 06.08.1902
BRIEF [O.A.] Hachet-Souplet, M... Pierre Author: Hachet-Souplet, M... Pierre Recipient: Haeckel, Ernst Corporation: Institut de Psychologie Zoologique Dating: 12.10.1902
BRIEF [O.A.] Haperine, E... Author: Haperine, E... Recipient: Haeckel, Ernst Corporation: Revue Contemporaine, Administration Dating: 03.11.1885
BRIEF [O.A.] Scherer, Jean Author: Scherer, Jean Recipient: Haeckel, Ernst Corporation: L`Illustration Dating: 05.04.1902
BRIEF [O.A.] Grand-Carteret, John Author: Grand-Carteret, John Recipient: Haeckel, Ernst Dating: 22.03.1906