Entered from booking ledger and New York Times concert listing and review. "WEEK'S CONCERT AND OPERA PROGRAMS." New York Times (1923-), May 10 1964, p. 1. ProQuest. Web. 15 Dec. 2023. Ericson, Raymond. "MISS RUNBERG HEARD IN A VIOLIN PROGRAM." New York Times (1923-), May 17 1964, p. 84. ProQuest. Web. 15 Dec. 2023.