2 Ebooks tarafından Zachary M. Hughes
Zachary M Hughes: Miner’s Rights and Mine Safety
News accounts of miners losing their lives as a result of accidents at underground coal mines have appeared more often in recent years. The methane explosion in 2006 at West Virginia’s Sago mine, in …
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DRM
€208.21
Elijah Wallace: Periodontal Disease
Periodontal disease (PD), an inflammatory disease of tooth supporting tissues that leads to progressive loss of periodontal ligament and bone, with pocket formation and / or recession of the gums, is …
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DRM
€141.57