Many of his writings are collected in Art as Art, edited by Barbara Rose, University of California Press, 1991.
In an interview with the art historian, Barbara Rose, Pepper said... "Another effect I'm trying to obtain with this bright finish is not simply illusion, but the inclusion of the person looking at it, so that there's a constant exchange going on between the viewer and the work" ....
The Vincent Melzac Collection, Forward by Walter Hopps, Introduction by Ellen Gross Landau, Retrospective Notes on the Washington Color School by Barbara Rose, Copyright 1971 The Corcoran Gallery of Art, Washington, D.C.: printed by Garamond/Pridemark Press, Baltimore, MD LCCC#75-153646
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