{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The ventilation of mines. Designed for use in schools and colleges; and for practical mining men in their study of the subject","author_name":"James Thom 1855- Beard","thumbnail_url":"https://www.ebooknetworking.net/books/117/838/big1178388115.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1178388115.html\">The ventilation of mines. Designed for use in schools and colleges; and for practical mining men in their study of the subject</a>","width":400,"height":300}