BRIEFENTWURF Palmén, Johan Axel Author: Palmén, Johan Axel Recipient: Haeckel, Ernst Dating: 1902.??.?? - 1907.??.??
BRIEFENTWURF Palmén, Johan Axel Author: Palmén, Johan Axel Recipient: Haeckel, Ernst Dating: 1902.??.?? - 1907.??.??
BRIEFENTWURF Haeckel, Ernst Author: Haeckel, Ernst Recipient: Eggeling, Heinrich Dating: vor 10.02.1902