{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"A treatise on practical and theoretical mine ventilation","author_name":"E. B. Wilson","thumbnail_url":"https://www.ebooknetworking.net/books/B00/6TM/bigB006TMH3GC.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B006TMH3GC.html\">A treatise on practical and theoretical mine ventilation</a>","width":400,"height":300}