BRIEF OHNE UMSCHLAG Hatschek, Berthold Author: Hatschek, Berthold Recipient: Haeckel, Ernst Dating: 01.05.1911
BRIEF OHNE UMSCHLAG Hatschek, Berthold Author: Hatschek, Berthold Recipient: Haeckel, Ernst Dating: 30.05.1911
BRIEF OHNE UMSCHLAG Hatschek, Berthold Author: Hatschek, Berthold Recipient: Haeckel, Ernst Dating: 15.04.1918
BRIEF OHNE UMSCHLAG Hatschek, Berthold Author: Hatschek, Berthold Recipient: Haeckel, Ernst Dating: 02.06.1918
BRIEF OHNE UMSCHLAG Hatschek, Berthold Author: Hatschek, Berthold Recipient: Haeckel, Ernst Dating: 24.06.1918
BRIEF OHNE UMSCHLAG Hatschek, Berthold Author: Hatschek, Berthold Recipient: Haeckel, Ernst Dating: 12.07.1918
BRIEF OHNE UMSCHLAG Hatschek, Berthold Author: Hatschek, Berthold Recipient: Haeckel, Ernst Dating: 01.11.1876