Clow (Native American studies, U. of Montana-Missoula) offers an overview of the gold milling industry in the Black Hills of South Dakota. A miner's geology of the region is followed by discussion of the developing industrial processes that led to each major shift in technology, from the construction of the first mills to the refinement of the blue refractory ores. The book includes abundant b & w illustrations, primarily of the buildings and landscapes. Annotation copyrighted by Book News, Inc., Portland, OR