BRIEF OHNE UMSCHLAG Fürbringer, Max Author: Fürbringer, Max Recipient: Haeckel, Ernst Dating: 05.08.1888
POSTKARTE Gabriel, Gábor Raimund Author: Gabriel, Gábor Raimund Recipient: Haeckel, Ernst Dating: 13.12.1913
POSTKARTE Gabriel, Gábor Raimund Author: Gabriel, Gábor Raimund Recipient: Haeckel, Ernst Dating: 17.12.1913
BRIEF [O.A.] Gabriel, Gábor Raimund Author: Gabriel, Gábor Raimund Recipient: Haeckel, Ernst Dating: 18.12.1913
BRIEF [O.A.] Gabriel, Gábor Raimund Author: Gabriel, Gábor Raimund Recipient: Haeckel, Ernst Dating: 19.12.1913
BRIEF [O.A.] Gabriel, Gábor Raimund Author: Gabriel, Gábor Raimund Recipient: Haeckel, Ernst Dating: 21.12.1913
BRIEF [O.A.] Gabriel, Gábor Raimund Author: Gabriel, Gábor Raimund Recipient: Haeckel, Ernst Dating: 22.12.1913
BRIEF [O.A.] Gabriel, Gábor Raimund Author: Gabriel, Gábor Raimund Recipient: Haeckel, Ernst Corporation: Gábor R. Gabriel Verlag Wien Dating: 24.12.1913
POSTKARTE Gabriel, Gábor Raimund Author: Gabriel, Gábor Raimund Recipient: Haeckel, Ernst Dating: 25.12.1913
