BRIEF OHNE UMSCHLAG Quincke, Heinrich Author: Quincke, Heinrich Recipient: Haeckel, Ernst Dating: 14.06.1874
BRIEF OHNE UMSCHLAG Quincke, Heinrich Author: Quincke, Heinrich Recipient: Haeckel, Ernst Dating: 19.06.1874
BRIEF OHNE UMSCHLAG Schuhmacher, Josef Author: Schuhmacher, Josef Recipient: Haeckel, Ernst Dating: 12.02.1914
BRIEF [O.A.] Vetter, Ferdinand Author: Vetter, Ferdinand Recipient: Haeckel, Ernst Dating: 16.05.1893
BRIEF [O.A.] Reinhard, W... Author: Reinhard, W... Recipient: Haeckel, Ernst Corporation: Redaktion des Pestalozzikalenders Dating: 05.12.1914
BRIEF [O.A.] Seelhorst, L... von Author: Seelhorst, L... von Recipient: Haeckel, Ernst Dating: 16.02.1894
