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Shield-loading Studies at an Eastern Appalachian Minesite
Thomas M. BarczakUnited States. Bureau of MinesStephen J. Kravits
出版U.S. Department of the Interior, Bureau of Mines, 1987
URLhttp://books.google.com.hk/books?id=y5YGPGnGO6gC&hl=&source=gbs_api
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