BRIEF OHNE UMSCHLAG Rottenburg, Paul von Author: Rottenburg, Paul von Recipient: Haeckel, Ernst Dating: 1895
BRIEF [O.A.] Bresgen, Maximilian Author: Bresgen, Maximilian Recipient: Haeckel, Ernst Dating: 24.04.1895
BRIEF [O.A.] Bresgen, Maximilian Author: Bresgen, Maximilian Recipient: Haeckel, Ernst Dating: 15.05.1895
BRIEF [O.A.] Bresgen, Maximilian Author: Bresgen, Maximilian Recipient: Haeckel, Ernst Dating: 30.05.1895
BRIEF [O.A.] Bresgen, Maximilian Author: Bresgen, Maximilian Recipient: Haeckel, Ernst Dating: 05.09.1895
BRIEF [O.A.] Bresgen, Maximilian Author: Bresgen, Maximilian Recipient: Haeckel, Ernst Dating: 09.11.1895
BRIEF [O.A.] Bresgen, Maximilian Author: Bresgen, Maximilian Recipient: Haeckel, Ernst Dating: 14.11.1895