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Methane Accumulations in Coal Mine Roof Cavities

Robert P. VinsonEdward D. ThimonsFred N. Kissell

出版	Department of the Interior, Bureau of Mines, 1978
URL	http://books.google.com.hk/books?id=NQE5ZTope9cC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN