The copper deposits of Michigan - Butler, B. S. (Bert Sylvenus), 1877-1960.; Burbank, W. S. (Wilbur Swett), 1898-1975. (Washington, Govt. Print. Off., 1929)
At head of title: Department of the Interior.
Maps and sections (pl. 2-52) in separate portfolio.
Bibliography: p. 3-14.
Keywords: Copper ores -- Michigan; Copper mines and mining -- Michigan