BRIEF OHNE UMSCHLAG Gompertz, Julius Author: Gompertz, Julius Recipient: Haeckel, Ernst Dating: 08.11.1903
BRIEF [O.A.] Gilchrist, John Dow Fisher Author: Gilchrist, John Dow Fisher Recipient: Haeckel, Ernst Corporation: Zoologisches Laboratorium Dating: 16.08.1893
BRIEF [O.A.] Gilchrist, John Dow Fisher Author: Gilchrist, John Dow Fisher Recipient: Haeckel, Ernst Corporation: Zoologisches Institut Dating: 03.09.1893
BRIEF [O.A.] Gilchrist, John Dow Fisher Author: Gilchrist, John Dow Fisher Recipient: Haeckel, Ernst Corporation: Zoologisches Institut Dating: 07.10.1893
BRIEF [O.A.] Gilchrist, John Dow Fisher Author: Gilchrist, John Dow Fisher Recipient: Haeckel, Ernst Dating: 06.12.1893
BRIEF OHNE UMSCHLAG Hercheler, Karl Author: Hercheler, Karl Recipient: Haeckel, Ernst Dating: 07.02.1919