{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Roof bolting in Alabama coal mines and iron-ore mines","author_name":"H. C. Young","thumbnail_url":"https://www.ebooknetworking.net/books/B00/3TZ/bigB003TZKY5E.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B003TZKY5E.html\">Roof bolting in Alabama coal mines and iron-ore mines</a>","width":400,"height":300}