"National Orchestral Association" . . . . . "choir and orchestra performance" . . "1957-03-19T20:45:00"^^ . . . . . "NEW YORK PREMIERE of Alan Hovhaness' EASTER CANTATA, OP. 100, NO. 3\r\nWORLD PREMIERE of Riccardo Malipiero's SINFONIA CANTATA \r\nU.S. PREMIERE of Giovanni Battista Sammartini's MAGNIFICAT" .