{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Mine Ventilation Made Easy: Wih An Appendix Containing Detailed Answers To 155 Questions Selected From Various American Examinations For Mine Inspectors And Mine Foremen...","author_name":"William Fairley","thumbnail_url":"https://www.ebooknetworking.net/books/127/159/big1271599090.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1271599090.html\">Mine Ventilation Made Easy: Wih An Appendix Containing Detailed Answers To 155 Questions Selected From Various American Examinations For Mine Inspectors And Mine Foremen...</a>","width":400,"height":300}