{"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 and Mine Ventilation, for Vocational Schools, and for Those, ... Mine Inspector Certificates (Classic Reprint)","author_name":"Joseph J. Walsh","thumbnail_url":"https://www.ebooknetworking.net/books/B00/8OA/bigB008OAI36G.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B008OAI36G.html\">Mining and Mine Ventilation, a Practical Handbook on the Physics and Chemistry of and Mine Ventilation, for Vocational Schools, and for Those, ... Mine Inspector Certificates (Classic Reprint)</a>","width":400,"height":300}