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21by Luppens, James A. (James Alan), 1946-Subjects: “...Coal Geology Wyoming Gillette....”
Published 2008
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22Published 2010Subjects: “...Coal leases Environmental aspects Wyoming Campbell County....”
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23Published 2011Subjects: “...Coal leases Environmental aspects Wyoming Campbell County....”
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24Published 2003Subjects: “...Mine gases Wyoming....”
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25Published 2002Subjects: “...Coal mines and mining Economic aspects Wyoming Gillette Region....”
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26Subjects: “...Coal mines and mining Environmental aspects Wyoming....”
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29Published 2012Subjects: “...Coal leases Environmental aspects Wyoming Campbell County....”
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30Published 2013Subjects: “...Coal leases Environmental aspects Wyoming Campbell County....”
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31Published 2013Subjects: “...Coal mines and mining Wyoming. http://id.loc.gov/authorities/subjects/sh86003261...”
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32by Wegemann, Carroll H.Subjects: “...Geology Wyoming. http://id.loc.gov/authorities/subjects/sh85054084...”
Published 1917
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33by Wright, Peter R.Subjects: “...Aquatic ecology Research Wyoming....”
Published 2006
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