BRIEF OHNE UMSCHLAG Rossipal, Karl Author: Rossipal, Karl Recipient: Haeckel, Ernst Dating: 12.02.1911
BRIEF OHNE UMSCHLAG Rossipal, Karl Author: Rossipal, Karl Recipient: Haeckel, Ernst Dating: 14.02.1906
BRIEF OHNE UMSCHLAG Rossipal, Karl Author: Rossipal, Karl Recipient: Haeckel, Ernst Dating: 13.02.1909
