BRIEF [O.A.] Seidlitz, Georg [von] Author: Seidlitz, Georg [von] Recipient: Haeckel, Ernst Dating: 17.03.1872
BRIEF OHNE UMSCHLAG Wagner, Moritz Author: Wagner, Moritz Recipient: Haeckel, Ernst Dating: 23.07.1872
BRIEF OHNE UMSCHLAG Wagner, Moritz Author: Wagner, Moritz Recipient: Haeckel, Ernst Dating: 27.07.1872
BRIEF [O.A.] Würtenberger, Leopold Author: Würtenberger, Leopold Recipient: Haeckel, Ernst Dating: 02.11.1872
BRIEF [O.A.] Alglave, Emile Author: Alglave, Emile Recipient: Haeckel, Ernst Corporation: Revue Politique et Littéraire, Revue Scientifique Dating: 20.04.1872
BRIEF [O.A.] Alglave, Emile Author: Alglave, Emile Recipient: Haeckel, Ernst Corporation: Revue Politique et Littéraire, Revue Scientifique Dating: 16.05.1872
BRIEF [O.A.] Alglave, Emile Author: Alglave, Emile Recipient: Haeckel, Ernst Corporation: Revue Politique et Littéraire, Revue Scientifique Dating: 23.11.1872