Entered from booking ledger and New York Times concert listing and review. Assisting performers are not identified. "Who Makes Music and Where." New York Times (1923-), 19 Oct. 1969, p. 1. ProQuest. Web. 4 June 2025. Strongin, Theodore. "Brevig, Trombonist, Plays Avant-Garde at 2d of 3 Recitals." New York Times (1923-), 20 Oct. 1969, p. 60. ProQuest. Web. 4 June 2025.