{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Ventilation in Metal Mines; A Preliminary Report","author_name":"Daniel Harrington","thumbnail_url":"https://www.ebooknetworking.net/books/123/559/big1235595897.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1235595897.html\">Ventilation in Metal Mines; A Preliminary Report</a>","width":400,"height":300}