{"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 ... mine foreman and mine inspector certificates","author_name":"Joseph James Walsh","thumbnail_url":"https://www.ebooknetworking.net/books/117/759/big1177599538.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1177599538.html\">Mining and mine ventilation: a practical handbook on the physics and chemistry of mining and mine ventilation for vocational schools, and for those ... mine foreman and mine inspector certificates</a>","width":400,"height":300}