BRIEF [O.A.] Abayawira, M. P. Abraham Author: Abayawira, M. P. Abraham Recipient: Haeckel, Ernst Dating: 12.05.1899
BRIEF [O.A.] Abayawira, M. P. Abraham Author: Abayawira, M. P. Abraham Recipient: Haeckel, Ernst Dating: 12.07.1899
BRIEF [O.A.] Abayawira, M. P. Abraham Author: Abayawira, M. P. Abraham Recipient: Haeckel, Ernst Dating: 10.08.1899
BRIEF OHNE UMSCHLAG Abel, Othenio Author: Abel, Othenio Recipient: Haeckel, Ernst Corporation: Kaiserlich-Königliche Geologische Reichsanstalt Dating: 15.02.1904
BRIEF OHNE UMSCHLAG Abel, Othenio Author: Abel, Othenio Recipient: Haeckel, Ernst Corporation: Paläontologisches Institut der K. K. Universität Dating: 16.05.1911
BRIEF OHNE UMSCHLAG Abel, Othenio Author: Abel, Othenio Recipient: Haeckel, Ernst Corporation: Palaeobiologischer Lehrapparat der K. K. Universität Wien Dating: 27.10.1918
BRIEF OHNE UMSCHLAG Basso von Gödel-Lannoy, Richard Author: Basso von Gödel-Lannoy, Richard Recipient: Haeckel, Ernst Dating: 03.08.1894
BRIEF [O.A.] Basso, Fritzi von Author: Basso, Fritzi von Recipient: Haeckel, Ernst Dating: 23.06.1914