BRIEF [O.A.] Furnemont, Leo Author: Furnemont, Leo Recipient: Haeckel, Ernst Corporation: Fédération Internationale de la Libre Pensée Dating: 18.06.1904
BRIEF [O.A.] Furnemont, Leo Author: Furnemont, Leo Recipient: Haeckel, Ernst Corporation: Fédération Internationale de la Libre Pensée Dating: 03.08.1904