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