ANSICHTSKARTE Grazie, Marie Eugenie delle; Müllner, Laurenz Author: Grazie, Marie Eugenie delle; Müllner, Laurenz Recipient: Haeckel, Ernst Dating: 23.08.1906
ANSICHTSKARTE Buchli, Christ... Author: Buchli, Christ... Recipient: Haeckel, Ernst Dating: 28.01.1906
ANSICHTSKARTE Semon, Richard W... Author: Semon, Richard W... Recipient: Haeckel, Ernst Dating: 28.11.1906
ANSICHTSKARTE Semon, Richard; Semon, Maria Author: Semon, Richard; Semon, Maria Recipient: Haeckel, Ernst Dating: 25.02.1906