Omega Guitar Quartet Entered from New York Times concert listing and review and booking ledger. "Entertainment Events Today." New York Times (1923-Current file): 42. Oct 21 1975. ProQuest. Web. 21 May 2014. Ericson, Raymond. "Music in Review." New York Times (1923-Current file): 57. Oct 26 1975. ProQuest. Web. 21 May 2014. WORLD PREMIERE of John Lambert's PERSONA chamber music performance 1975-10-21T20:00:00