BRIEF OHNE UMSCHLAG Breitenbach, Wilhelm Author: Breitenbach, Wilhelm Recipient: Haeckel, Ernst Dating: 24.10.1898
BRIEF OHNE UMSCHLAG Breitenbach, Wilhelm Author: Breitenbach, Wilhelm Recipient: Haeckel, Ernst Dating: 07.12.1898
BRIEF [O.A.] Bucchich, Gregorio Author: Bucchich, Gregorio Recipient: Haeckel, Ernst Dating: 03.09.1898
BRIEF [O.A.] Breitkopf Author: Breitkopf Recipient: Haeckel, Ernst Corporation: Breitkopf & Härtel Dating: 17.11.1898
BRIEF [O.A.] Brenner, Leo Author: Brenner, Leo Recipient: Haeckel, Ernst Corporation: Manora-Sternwarte Dating: 06.01.1898
BRIEF [O.A.] Bresgen, Maximilian Author: Bresgen, Maximilian Recipient: Haeckel, Ernst Dating: 25.06.1898
BRIEF [O.A.] Bresgen, Maximilian Author: Bresgen, Maximilian Recipient: Haeckel, Ernst Dating: 04.07.1898
BRIEF [O.A.] Bresgen, Maximilian Author: Bresgen, Maximilian Recipient: Haeckel, Ernst Dating: 19.07.1898
