BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: de Gruyter, Walter Dating: 25.03.1914
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Cartellieri, Georg Maximilian Alexander Dating: 24.06.1914
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Cartellieri, Georg Maximilian Alexander Dating: 01.07.1914
BRIEFENTWURF Cartellieri, Georg Maximilian Alexander Author: Cartellieri, Georg Maximilian Alexander Recipient: Haeckel, Ernst Dating: 06.07.1914
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Cartellieri, Georg Maximilian Alexander Dating: 27.07.1914
BRIEFENTWURF Haeckel, Ernst Author: Haeckel, Ernst Recipient: Cartellieri, Georg Maximilian Alexander Dating: 27.07.1914
BRIEF [O.A.] Kellermann, Hermann Author: Kellermann, Hermann Recipient: Haeckel, Ernst Corporation: Alexander Duncker Verlag Dating: 01.01.1914
