Entered from booking ledger and New York Times concert listing and review. The only members of the ensemble identified by name are Yoko Matsuda, violin; George Silfies, clarinet; and Gilbert Kalish, piano. "Who Makes Music and Where." New York Times (1923-), 19 Apr. 1970, p. 103. ProQuest. Web. 29 July 2025. Henahan, Donal. "Year-Old Ensemble Treats Listeners to Happy Birthday." New York Times (1923-), 21 Apr. 1970, p. 50. ProQuest. Web. 29 July 2025.