{"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 Beard","thumbnail_url":"https://www.ebooknetworking.net/books/B00/68F/bigB0068FTRN2.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0068FTRN2.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}