. . . . "Entered from booking ledger and New York Times concert listing and review.\r\nWORLD PREMIERE of Paul Zonn's DUPLUM\r\n\"Who Makes Music and Where.\" New York Times (1923-), 05 Jan. 1969, p. 1. ProQuest. Web. 30 Apr. 2025.\r\nHughes, Allen. \"Paul Hersh Appears with Lenox Colleague.\" New York Times (1923-), 13 Jan. 1969, p. 30. ProQuest. Web. 30 Apr. 2025." . "duo recital" . . . "Delmar Pettys, Violin, and Paul Hersh, Viola and Piano" . . "1969-01-11T20:30:00"^^ .