BRIEF [O.A.] Carneri, Bartholomäus von Author: Carneri, Bartholomäus von Recipient: Haeckel, Ernst Dating: 11.09.1885
BRIEF [O.A.] Carneri, Bartholomaeus von Author: Carneri, Bartholomaeus von Recipient: Haeckel, Ernst Dating: 18.05.1909
BRIEF [O.A.] Haeckel, Ernst Author: Haeckel, Ernst Recipient: Haeckel, Agnes; Haeckel, Charlotte Dating: 09.08.1882