BRIEF OHNE UMSCHLAG Reisert, Ernst Author: Reisert, Ernst Recipient: Haeckel, Ernst Dating: 15.02.1911
BRIEF OHNE UMSCHLAG Reisert, Ernst Author: Reisert, Ernst Recipient: Haeckel, Ernst Dating: 14.01.1911
KARTE Reisert, Fritz; Reisert, Else Author: Reisert, Fritz; Reisert, Else Recipient: Haeckel, Ernst Dating: 15.04.1911