{"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 Inspecto","author_name":"William Fairley","thumbnail_url":"https://www.ebooknetworking.net/books/123/230/big1232303933.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1232303933.html\">Mine Ventilation Made Easy; Wih an Appendix Containing Detailed Answers to 155 Questions Selected from Various American Examinations for Mine Inspecto</a>","width":400,"height":300}