Methods of development and pillar extraction in mining the Pittsburgh coal bed in Pennsylvania, West Virginia, and Ohio Buy on Amazon

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Methods of development and pillar extraction in mining the Pittsburgh coal bed in Pennsylvania, West Virginia, and Ohio

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ISBN / ASINB003YXZG5Y
ISBN-13978B003YXZG54
AvailabilityUsually ships in 24 hours
MarketplaceUnited States  🇺🇸
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