"Fleetwood Singers" . . . . . . . . "choir performance" . "1953-04-28T20:30:00"^^ . . . "Entered from program calendar and New York Times concert listing and review.\r\n\"Concert and Opera Programs of the Week.\" New York Times (1923-Current file): 1. Apr 26 1953. ProQuest. Web. 3 Sep. 2014.\r\n\"Fleetwood Directs Singers at Concert.\" New York Times (1923-Current file): 33. Apr 29 1953. ProQuest. Web. 3 Sep. 2014.\r\nU.S. PREMIERE of Johannes Ockeghem's MISSA PROLATIONUM" . . . . . . . . .