New York Debut Entered from booking ledger and New York Times concert listing and review. "Who Makes Music and Where: PROM" CONCERTS OTHER EVENTS." New York Times (1923-), May 21 1967, p. 1. ProQuest. Web. 18 Oct. 2024. "LOCAL PIANO DEBUT FOR BENJAMIN GRAY." New York Times (1923-), May 26 1967, p. 50. ProQuest. Web. 21 Oct. 2024.