{"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 ... the safe and efficient operation ... [ 1920 ]","author_name":"James Thom Beard","thumbnail_url":"https://www.ebooknetworking.net/books/111/234/big1112343792.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1112343792.html\">Mine gases and ventilation: textbook for students of mining, mining engineers and candidates preparing for mining examinations designed for working ... the safe and efficient operation ... [ 1920 ]</a>","width":400,"height":300}