Bonnie Hampton, Cello, and Nathan Schwartz, Piano Entered from booking ledger and New York Times concert listing and review. NEW YORK PREMIERE of Leonard Klein's CONCERT MUSIC "Who Makes Music and Where." New York Times (1923-), May 14 1967, p. 1. ProQuest. Web. 10 Oct. 2024. "Bonnie Hampton, Cellist, Plays Recital, with Schwartz at Piano." New York Times (1923-), May 15 1967, p. 51. ProQuest. Web. 10 Oct. 2024. duo recital 1967-05-14T17:30:00