BRIEF [O.A.] Recipient: Haeckel, Ernst Corporation: L' Association des Etudiants de la Faculté de Médecine de Constantinople
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Charlotte Dating: 05.04.1873
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Charlotte Dating: 18.04.1873