. . . . "1958-11-15T14:30:00"^^ . . "Twenty-first season, first concert.\r\nNEW YORK PREMIERE of Eli Krul's PIANO SONATA\r\nNEW YORK PREMIERE of Albert Tepper's VIOLA SONATA\r\nWORLD PREMIERE of Claire Polin's FLUTE SONATA\r\nWORLD PREMIERE of Harold Morris's PIANO QUINTET\r\n" . "Concert by the National Association for American Composers and Conductors" . . . . . "chamber music performance" .