. "National Orchestral Association" . "Entered from program calendar and New York Times concert listing.\r\n\"Programs of the Week.\" New York Times (1923-Current file) Apr 18 1948: 1. ProQuest. 17 Oct. 2013.\r\n\"Leon Barzin Offers Present-Day Music.\" New York Times (1923-Current file) Apr 20 1948: 34. ProQuest. 17 Oct. 2013." . . . . . . "1948-04-19T20:45:00"^^ . . . . "symphony orchestra performance" . . .