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1Published 2001Subjects: “...Coal mines and mining Environmental aspects Wyoming Campbell County....”
Government Document Microform Book -
2Published 2003Subjects: “...Coal leases Environmental aspects Wyoming....”
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Government Document Microform Book -
3Published 2000Subjects: “...Coal leases Wyoming Campbell County....”
Government Document Microform Book -
4Published 2000Subjects: “...Coal leases Environmental aspects Wyoming Campbell County....”
Government Document Microform Book