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Government Document Book -
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8
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9Published 1978Subjects: “...Coal gasification....”
Government Document Book -
10Published 1978Subjects: “...Coal Transportation....”
Government Document Book -
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12
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13
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14
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15
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16Published 1977Subjects: “...Coal liquefaction....”
Government Document Book -
17Published 1977Subjects: “...Coal gasification....”
Government Document Book -
18
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19by Freese, Barbara (Barbara E.)Subjects: “...Coal History....”
Published 2003
Table of contents
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20by Chaffin, Lillie D.Subjects: “...Coal mines and mining Juvenile literature....”
Published 1974
Book