BRIEF [O.A.] Littrow, Heinrich von Author: Littrow, Heinrich von Recipient: Haeckel, Ernst Dating: 05.01.1881
BRIEF [O.A.] Littrow, Heinrich von Author: Littrow, Heinrich von Recipient: Haeckel, Ernst Dating: 29.06.1881
BRIEF [O.A.] Littrow, Heinrich von Author: Littrow, Heinrich von Recipient: Haeckel, Ernst Dating: 07.05.1886
BRIEF [O.A.] Arbesser, Cäsar v. Author: Arbesser, Cäsar v. Recipient: Haeckel, Ernst Dating: 08.04.1911
BRIEF [O.A.] Arbesser, Cäsar v. Author: Arbesser, Cäsar v. Recipient: Haeckel, Ernst Dating: 16.04.1911
BRIEF OHNE UMSCHLAG Marojevic, Bonagracija Author: Marojevic, Bonagracija Recipient: Haeckel, Ernst Dating: 07.07.1871
BRIEF OHNE UMSCHLAG Marojevic, Bonagracija Author: Marojevic, Bonagracija Recipient: Haeckel, Ernst Dating: 18.11.1871
BRIEF OHNE UMSCHLAG Marojevic, Bonagracija Author: Marojevic, Bonagracija Recipient: Haeckel, Ernst Dating: 26.07.1872
BRIEF OHNE UMSCHLAG Marojevic, Bonagracija Author: Marojevic, Bonagracija Recipient: Haeckel, Ernst Dating: 03.11.1874
BRIEF OHNE UMSCHLAG Marojevic, Bonagracija Author: Marojevic, Bonagracija Recipient: Haeckel, Ernst Dating: 19.01.1881