Charles-Joseph Bopp, Flute Entered from booking ledger and New York Times concert listing and review. The correct program order is uncertain (the Brahms work for solo piano is not mentioned in the event listing). "Who Makes Music and Where." New York Times (1923-), 04 May 1969, p. 1. ProQuest. Web. 20 May 2025. Strongin, Theodore. "The Bopps, Married Duo, Perform on Flute and Piano." New York Times (1923-), 09 May 1969, p. 37. ProQuest. Web. 20 May 2025. solo recital 1969-05-08T20:30:00