Entered from booking ledger and New York Times concert listing and review. "CONCERT AND OPERA PROGRAMS FOR THE WEEK: OPERA METROPOLITAN." New York Times (1923-Current file), Feb 24 1957, p. 114. ProQuest. Web. 13 May 2021. "Mildah Polia Gives Recital." New York Times (1923-Current file), Mar 01 1957, p. 15. ProQuest. Web. 14 May 2021.