 His books "Counterpoint" and "The Technique of Orchestration" have been widely used as classroom texts.On May 5, 1957, Howard Hanson and the Eastman-Rochester Orchestra recorded Kennan's "Three Pieces for Orchestra", a work composed in Rome in 1936 and premiered in 1939 by Hanson and the Rochester orchestra.It was released by Mercury Records on LP (SR90147) and CD (434307-2).