1982. Postcard (verso). Beuys/ Rosebery/ Fuller, editioned prints by Joseph Beuys available for purchase through Ronald Feldman Fine Arts, New York.
1982. Postcard (recto). Beuys/ Rosebery/ Fuller, editioned prints by Joseph Beuys, available for purchase through Ronald Feldman Fine Arts, New York.
1973. Letter to Demarco from gallery director Ronald Feldman (New York) , ref. Beuys and contact with East European artists.