BRIEF [O.A.] Alglave, Emile Author: Alglave, Emile Recipient: Haeckel, Ernst Corporation: Revue Politique et Littéraire, Revue Scientifique Dating: 25.09.1874
BRIEF [O.A.] Moquin-Tandon, Gaston Author: Moquin-Tandon, Gaston Recipient: Haeckel, Ernst Dating: 12.??.1874