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21
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22
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23
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24by Shelley, TobySubjects “...Petroleum industry and trade Political aspects....”
Published 2005
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25
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26
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27by Yergin, DanielSubjects “...Petroleum industry and trade Political aspects History 20th century....”
Published 1991
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28
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29
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30by Standlea, David M., 1956-Subjects “...Petroleum industry and trade Political aspects United States....”
Published 2006
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