{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Health hazards from inadequate coal-mine ventilation","author_name":"R. R. Sayers","thumbnail_url":"https://www.ebooknetworking.net/books/B00/41K/bigB0041KJHD6.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0041KJHD6.html\">Health hazards from inadequate coal-mine ventilation</a>","width":400,"height":300}