BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Binswanger, Otto Dating: 25.04.1911
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Binswanger, Otto Dating: 25.04.1911
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Binswanger, Otto Dating: 05.05.1900
BRIEF OHNE UMSCHLAG Winkelmann, Adolf; Haeckel, Ernst Author: Winkelmann, Adolf; Haeckel, Ernst Recipient: Binswanger, Otto Dating: 02.07.1900