BRIEF [O.A.] Soury, Jules Author: Soury, Jules Recipient: Haeckel, Ernst Corporation: Ècole des Hautes Ètudes Dating: 17.02.1904
BRIEF [O.A.] Soury, Jules Author: Soury, Jules Recipient: Haeckel, Ernst Corporation: Ècole des Hautes Ètudes Dating: 26.06.1904