{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Mining and mine ventilation : a practical handbook on the physics and chemistry of mining and mine ventilation for vocational schools, and for those qualifying for mine foreman and inspector cert","author_name":"Joseph James Walsh","thumbnail_url":"https://www.ebooknetworking.net/books/B00/PEW/bigB00PEWC5WA.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B00PEWC5WA.html\">Mining and mine ventilation : a practical handbook on the physics and chemistry of mining and mine ventilation for vocational schools, and for those qualifying for mine foreman and inspector cert</a>","width":400,"height":300}