{"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 (Classic Reprint)","author_name":"James T. Beard","thumbnail_url":"https://www.ebooknetworking.net/books/133/233/big1332333303.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1332333303.html\">The Ventilation of Mines: Designed for Use in Schools and Colleges; And for Practical Mining Men in Their Study of the Subject (Classic Reprint)</a>","width":400,"height":300}