BRIEF [O.A.] Kappstein, Theodor Author: Kappstein, Theodor Recipient: Haeckel, Ernst Dating: 09.08.1912
BRIEF [O.A.] Kappstein, Theodor Author: Kappstein, Theodor Recipient: Haeckel, Ernst Dating: 19.11.1912
BRIEF [O.A.] Kappstein, Theodor Author: Kappstein, Theodor Recipient: Haeckel, Ernst Corporation: Redaction des Berliner Tageblatt Dating: 05.08.1900
BRIEF [O.A.] Kappstein, Theodor Author: Kappstein, Theodor Recipient: Haeckel, Ernst Corporation: Berliner Presseclub Dating: 21.04.1902
BRIEF [O.A.] Kappstein, Theodor Author: Kappstein, Theodor Recipient: Haeckel, Ernst Corporation: Berliner Presseclub Dating: 18.05.1902
BRIEF [O.A.] Kappstein, Theodor Author: Kappstein, Theodor Recipient: Haeckel, Ernst Dating: 09.02.1905
BRIEF [O.A.] Kappstein, Theodor Author: Kappstein, Theodor Recipient: Haeckel, Ernst Dating: 08.04.1905
BRIEF [O.A.] Kappstein, Theodor Author: Kappstein, Theodor Recipient: Haeckel, Ernst Dating: 13.04.1905
BRIEF [O.A.] Kappstein, Theodor Author: Kappstein, Theodor Recipient: Haeckel, Ernst Dating: 15.04.1905