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61Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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62Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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63Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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64Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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65Published 1935Subjects: “...Coal-mining machinery Law and legislation United States....”
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66Published 2012Subjects: “...Coal-mining machinery Safety regulations United States....”
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67by DuCarme, Joseph P.Subjects: “...Coal-mining machinery Appalachian Mountains Models....”
Published 1996
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68by Yenchek, M. R. (Michael R.)Subjects: “...Coal-mining machinery Electric equipment Protection....”
Published 1993
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69by Hotchkiss, Willard E. (Willard Eugene), 1874-1956Subjects: “...Coal-mining machinery United States....”
Published 1940
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70by Dix, KeithSubjects: “...Coal-mining machinery Social aspects United States History 20th century....”
Published 1988
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71by Christofferson, DonaldSubjects: “...Coal-mining machinery Technological innovations....”
Published 1983
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72Published 1999Subjects: “...Coal-mining machinery Australia Safety measures....”
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73Published 1831Subjects: “...Coal-mining machinery....”
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74Published 2011Subjects: “...Coal-mining machinery United States Safety measures....”
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75Published 1995Subjects: “...Coal-mining machinery Minnesota Minneapolis Metropolitan Area....”
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76Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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77Published 2006Subjects: “...Coal-mining machinery United States Safety measures....”
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79Published 2009Subjects: “...Coal-mining machinery United States Noise Safety measures Cost effectiveness....”
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80Subjects: “...Coal-mining machinery. http://id.loc.gov/authorities/subjects/sh85027388...”
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