. . . . "symphony orchestra performance" . "tribute" . . "Debut of the Senior Musicians Symphony\r\nBenefit: Musicians Aid Society\r\nWORLD PREMIERE of Dimitri Mitropoulos' OSTINATA" . . . . . . . . "1962-04-01T20:15:00"^^ . "Dimitri Mitropoulos-Bruno Walter Memorial Concert" . . . . "choir performance" . . .