BRIEF [O.A.] Enderlein, Günther Author: Enderlein, Günther Recipient: Haeckel, Ernst Dating: 15.02.1914
BRIEF OHNE UMSCHLAG Eckstein, Ernst; Pachur, Wilhelm; Ossig, Johannes; Friedländer, Georg; Landau, Fritz; Kallmann, Franz; Kramer, Edwin; Schindler, Walter Author: Eckstein, Ernst; Pachur, Wilhelm; Ossig, Johannes; Friedländer, Georg; Landau, Fritz; Kallmann, Franz; Kramer, Edwin; Schindler, Walter Recipient: Haeckel, Ernst Dating: 16.02.1914