POSTKARTE Zachariewicz, Julian von Author: Zachariewicz, Julian von Recipient: Haeckel, Ernst Dating: 04.02.1917
POSTKARTE Jacobsthal, Joh... Eduard Author: Jacobsthal, Joh... Eduard Recipient: Haeckel, Ernst Dating: 08.06.1899
POSTKARTE Zachariewicz, Julian von Author: Zachariewicz, Julian von Recipient: Haeckel, Ernst Dating: 24.12.1909