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1by Toenges, Albert L. (Albert Louis), 1889-“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1947
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2“...Report of investigations (United States. Bureau of Mines) ;...”
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3by Jolley, T. R. (Theodore R.), Toenges, Albert L. (Albert Louis), 1889-, Turnbull, Louis A.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1952
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