GRUSSADRESSE Makstis, Roberts [et al.] Author: Makstis, Roberts [et al.] Recipient: Haeckel, Ernst Corporation: Bildungs-Verein "Vjestnik Snanja" Dating: 16.02.1909
BRIEF [O.A.] Hafferberg, Rob... C... Author: Hafferberg, Rob... C... Recipient: Haeckel, Ernst Dating: 26.10.1901