. . . . "chamber music performance" . . . "1961-03-26T17:30:00"^^ . "Matthew Raimondi, Violin" . . . . . "WORLD PREMIERE of Morton Feldman's THREE INSTRUMENTS\r\nNEW YORK PREMIERE of Luciano Berio's DUE PEZZI\r\nNEW YORK PREMIERE of Matyas Seiber's CONCERT PIECE" .