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Riedel, Johannes. “Ives—His Musical Style.” Lecture, Ives at Minnesota, University of Minnesota, Minneapolis, Minnesota, April 17 1970.

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Charles G. Bordy and Margaret Snell. "The Charles Ives Fest-ival, Spring 1970—Reflections." Current Musicology (May) 11: 57.

Reeve, Lew. “Charles Ives’ Music Done Well in Con-cert.” Minneapolis Star. April 8.