BRIEF OHNE UMSCHLAG Kraigher-Porges, Josepha Author: Kraigher-Porges, Josepha Recipient: Haeckel, Ernst Dating: 05.10.1900
BRIEF OHNE UMSCHLAG Kraigher-Porges, Josepha Author: Kraigher-Porges, Josepha Recipient: Haeckel, Ernst Dating: 18.12.1901