Victor Stern, Viola, and Juan Mercadel, Guitar Entered from booking ledger and New York Times concert listing and review. Victor Stern and Juan Mercadel were on the faculty of the University of Miami. "Who Makes Music." New York Times (1923-), Jun 11 1967, p. 128. ProQuest. Web. 22 Oct. 2024. "A VIOLA AND GUITAR COMBINE IN CONCERT." New York Times (1923-), Jun 16 1967, p. 38. ProQuest. Web. 22 Oct. 2024. duo recital 1967-06-15T20:30:00