{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Mine gases and ventilation; textbook for students of mining, mining engineers and candidates preparing for mining examinations designed for working ... as they relate to the safe and effecien","author_name":"James Thom Beard","thumbnail_url":"https://www.ebooknetworking.net/books/117/760/big1177600978.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1177600978.html\">Mine gases and ventilation; textbook for students of mining, mining engineers and candidates preparing for mining examinations designed for working ... as they relate to the safe and effecien</a>","width":400,"height":300}