"Helen Norvelle, Soprano" . . . . . . "Entered from booking ledger and New York Times concert listing.\r\n\"CONCERT AND OPERA PROGRAMS FOR THE WEEK.\" New York Times (1923-Current file): 1. Mar 17 1957. ProQuest. Web. 21 June 2016." . . . . . . . . . "1957-03-17T17:30:00"^^ . "solo recital" . . . . . . .