New York Recital Debut Entered from booking ledger and New York Times concert listing and review. "THIS WEEK'S CONCERT AND OPERA PROGRAMS." New York Times (1923-), Nov 10 1963, p. 1. ProQuest. Web. 17 Oct. 2023. Strongin, Theodore. "Greenspan, Violinist, Plays; Wife Serves as Accompanist." New York Times (1923-), Nov 13 1963, p. 38. ProQuest. Web. 19 Oct. 2023.