{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Strata interactions in multiple-seam mining--two case studies in Pennsylvania","author_name":"G. J. Chekan","thumbnail_url":"https://www.ebooknetworking.net/books/B00/3HK/bigB003HKRPO4.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B003HKRPO4.html\">Strata interactions in multiple-seam mining--two case studies in Pennsylvania</a>","width":400,"height":300}