BRIEF [O.A.] Daxenbichler, Fanny Author: Daxenbichler, Fanny Recipient: Haeckel, Ernst Dating: 14.02.1913
POSTKARTE Rakus, Theodor G... Author: Rakus, Theodor G... Recipient: Haeckel, Ernst Dating: 02.01.1913
POSTKARTE Rakus, Theodor G... Author: Rakus, Theodor G... Recipient: Haeckel, Ernst Dating: 05.01.1913
BRIEF OHNE UMSCHLAG Crammer, Hans Author: Crammer, Hans Recipient: Haeckel, Ernst Corporation: Salzburger Hochschulverein Dating: ??.04.1913