Entered from booking ledger and New York Times concert listing and review. WORLD PREMIERE of Robert Kogan's SONATA NO. 2 FOR FLUTE, MARIMBA, AND VIOLA “Arts and Leisure Guide.” New York Times [New York, N.Y., United States], 1 June 1975, p. D3. Henahan, Donal. “Music in Review: Miss George Shows Facility on Flute.” New York Times [New York, N.Y., United States], 8 June 1975, p. 52.