BRIEF [O.A.] Stubenrauch, Max von Author: Stubenrauch, Max von Recipient: Haeckel, Ernst Dating: 24.06.1903
BRIEF [O.A.] Stubenrauch, Max von Author: Stubenrauch, Max von Recipient: Haeckel, Ernst Dating: 15.02.1904
BRIEF [O.A.] Stubenrauch, Max von Author: Stubenrauch, Max von Recipient: Haeckel, Ernst Dating: 27.06.1903