BRIEFENTWURF Sprenger, Therese Author: Sprenger, Therese Recipient: Haeckel, Ernst Dating: 23.12.1912
BRIEFENTWURF Cartellieri, Georg Maximilian Alexander Author: Cartellieri, Georg Maximilian Alexander Recipient: Haeckel, Ernst Dating: 06.07.1914
BRIEFENTWURF Michels, Victor Karl Theodor Author: Michels, Victor Karl Theodor Recipient: Haeckel, Ernst Corporation: Senat der Universität Jena Dating: 02.12.1916
BRIEFENTWURF Hedemann, Justus Wilhelm Author: Hedemann, Justus Wilhelm Recipient: Haeckel, Ernst Dating: 06.06.1919
BRIEFENTWURF Eggeling, Heinrich Author: Eggeling, Heinrich Recipient: Haeckel, Ernst Dating: 04.06.1908
BRIEFENTWURF Eggeling, Heinrich von Author: Eggeling, Heinrich von Recipient: Haeckel, Ernst Dating: 21.02.1907
BRIEFENTWURF Breitenbach, Wilhelm Author: Breitenbach, Wilhelm Recipient: Haeckel, Ernst Dating: 27.11.1916
BRIEFENTWURF Linck, Gottlob Author: Linck, Gottlob Recipient: Haeckel, Ernst Corporation: Senat der Universität Jena Dating: 14.11.1912
BRIEFENTWURF Cartellieri, Georg Maximilian Alexander Author: Cartellieri, Georg Maximilian Alexander Recipient: Haeckel, Ernst Corporation: Senat der Universität Jena Dating: 18.07.1914
BRIEFENTWURF Cartellieri, Georg Maximilian Alexander Author: Cartellieri, Georg Maximilian Alexander Recipient: Haeckel, Ernst Corporation: Senat der Universität Jena Dating: 12.09.1914