BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 19.01.1919
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 26.01.1919
BRIEF OHNE UMSCHLAG Haeckel, Ernst Author: Haeckel, Ernst Recipient: Waldthausen, Ellen Dating: 14.02.1919
BRIEF OHNE UMSCHLAG Haeckel, Walter Author: Haeckel, Walter Recipient: Waldthausen, Ellen Dating: 10.08.1917
