BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Uslar-Gleichen, Bernhard von Dating: 05.09.1904
BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Uslar-Gleichen, Bernhard von Dating: 08.12.1904
BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Uslar-Gleichen, Bernhard von Dating: 15.12.1904
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Richard, Jules Corporation: Zoologisches Institut der Universität Jena Dating: 30.07.1904
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: N.N. Corporation: Zoologisches Institut der Universität Jena Dating: 16.12.1904
TELEGRAMM Grazie, Marie Eugenie delle; Müllner, Laurenz Author: Grazie, Marie Eugenie delle; Müllner, Laurenz Recipient: Haeckel, Ernst Dating: 15.02.1904
ANSICHTSKARTE Grazie, Marie Eugenie delle; Müllner, Laurenz Author: Grazie, Marie Eugenie delle; Müllner, Laurenz Recipient: Haeckel, Ernst Dating: 19.08.1904
BRIEF [O.A.] Gümbel, C. Godfrey Author: Gümbel, C. Godfrey Recipient: Haeckel, Ernst Dating: 23.02.1904