BRIEF [O.A.] Breuer, Cornel H... Author: Breuer, Cornel H... Recipient: Haeckel, Ernst Dating: 10.10.1904
BRIEF [O.A.] Breuer, Cornel H... Author: Breuer, Cornel H... Recipient: Haeckel, Ernst Dating: 16.10.1904
BRIEF [O.A.] Breuer, Cornel H... Author: Breuer, Cornel H... Recipient: Haeckel, Ernst Dating: 14.02.1905
BRIEF [O.A.] Breuer, Cornel H... Author: Breuer, Cornel H... Recipient: Haeckel, Ernst Dating: 06.03.1908
BRIEF [O.A.] Tarczay, Ludwig Author: Tarczay, Ludwig Recipient: Haeckel, Ernst Corporation: Vilagossag Dating: 12.06.1904