New York Recital Debut Entered from booking ledger and New York Times concert listing and review. The correct program order is uncertain. "Entertainment Events." New York Times (1923-), Jun 14 1968, p. 40. ProQuest. Web. 13 Jan. 2025. Hughes, Allen. "RECITAL DEBUT MADE BY SOSA, BARITONE." New York Times (1923-), Jun 15 1968, p. 38. ProQuest. Web. 13 Jan. 2025.