Entered from booking ledger and New York Times concert listing and review. "PROGRAMS OF THE WEEK." New York Times (1923-Current file), May 26 1957, p. 1. ProQuest. Web. 25 Aug. 2021. "RECITAL IS OFFERED BY BOUCHON, TENOR." New York Times (1923-Current file), May 28 1957, p. 28. ProQuest. Web. 26 Aug. 2021.