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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Book Details
ISBN / ASIN B003YXZG5Y
ISBN-13 978B003YXZG54
Availability Usually ships in 24 hours
Marketplace United States 🇺🇸
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