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By "Roys, Lawrence, 1884-"
Lowry ruin in southwestern Colorado / Paul S. Martin ; with reports on masonry of Lowry ruin and of the Southwest, by Lawrence Roys, and skeletal material from the Lowry area, by Gerhardt von Bonin.
By: Martin, Paul S. - Bonin, Gerhardt von, - Roys, Lawrence,
Publication info: Chicago :Field Museum of Natural History,1936.
Contributed by: University of Illinois Urbana Champaign