Entered from booking ledger and New York Times concert listing and review. Henle, Fritz. "CONCERT AND OPERA PROGRAMS FOR THE WEEK." New York Times (1923-Current file), May 12 1957, p. 1. ProQuest. Web. 16 Aug. 2021. "Guitarist Gives Recital here." New York Times (1923-Current file), May 13 1957, p. 28. ProQuest. Web. 16 Aug. 2021.