BRIEF [O.A.] Bucchich, Gregorio Author: Bucchich, Gregorio Recipient: Haeckel, Ernst Dating: 26.03.1895
BRIEF [O.A.] Bucchich, Gregorio Author: Bucchich, Gregorio Recipient: Haeckel, Ernst Dating: 09.04.1895
BRIEF [O.A.] Bucchich, Gregorio Author: Bucchich, Gregorio Recipient: Haeckel, Ernst Dating: 30.08.1895
BRIEF [O.A.] Bucchich, Gregorio Author: Bucchich, Gregorio Recipient: Haeckel, Ernst Dating: 29.12.1895
BRIEF OHNE UMSCHLAG Stürtz, B. Author: Stürtz, B. Recipient: Haeckel, Ernst Corporation: Mineralogisches und Paleontologisches Comptoir Bernhard Stürtz Dating: 08.12.1895