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Strategies for encouraging miners to stay away from unsupported roof and perform self-protective actions /

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Détails bibliographiques
Auteur principal: Peters, Robert H.
Format: Inconnue
Langue:anglais
Publié: Pittsburgh, Pa. : U.S. Dept. of the Interior, Bureau of Mines, 990.
Collection:Information circular (United States. Bureau of Mines) ; 9283.
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