Entered from booking ledger and New York Times concert listing and review. "CONCERT AND OPERA PROGRAMS OF THE WEEK." New York Times (1923-Current file), Apr 05 1959, p. 1. ProQuest. Web. 23 July 2020. "Dwain De Paul, Baritone, Sings." New York Times (1923-Current file), Apr 06 1959, p. 32. ProQuest. Web. 23 July 2020.