BRIEF OHNE UMSCHLAG Focke, Wilhelm Olbers Author: Focke, Wilhelm Olbers Recipient: Haeckel, Ernst Dating: 15.02.1905
BRIEF OHNE UMSCHLAG Focke, Wilhelm Olbers Author: Focke, Wilhelm Olbers Recipient: Haeckel, Ernst Dating: 09.03.1905
BRIEF OHNE UMSCHLAG Focke, Wilhelm Olbers Author: Focke, Wilhelm Olbers Recipient: Haeckel, Ernst Dating: 22.08.1905
BRIEF [O.A.] Gansberg, Fritz Author: Gansberg, Fritz Recipient: Haeckel, Ernst Corporation: Die Vereinigung für Schulreform Dating: ??.05.1905
BRIEF [O.A.] Rasch, F... Author: Rasch, F... Recipient: Haeckel, Ernst Corporation: Verein für Naturkunde in Bremen Dating: 14.11.1905
BRIEF [O.A.] Kradolfer, Elisabeth Author: Kradolfer, Elisabeth Recipient: Haeckel, Ernst Dating: 23.01.1905
BRIEF [O.A.] Kradolfer, Elisabeth Author: Kradolfer, Elisabeth Recipient: Haeckel, Ernst Dating: 13.01.1905
BRIEF [O.A.] Leuwer, Franz Author: Leuwer, Franz Recipient: Haeckel, Ernst Corporation: Buch- und Kunst-Handlung Dating: 26.04.1905