POSTKARTE Baege, Max Hermann Author: Baege, Max Hermann Recipient: Haeckel, Ernst Corporation: Freie Hochschule Berlin Dating: 24.01.1905
POSTKARTE Baege, Max Hermann Author: Baege, Max Hermann Recipient: Haeckel, Ernst Corporation: Freie Hochschule Berlin Dating: 15.04.1905
POSTKARTE Alfano, Giuseppe Edoardo Author: Alfano, Giuseppe Edoardo Recipient: Haeckel, Ernst Dating: 26.11.1905