{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Falls of roof in mines operating in the Pittsburgh Coal Bed, West Virginia","author_name":"Paul, James Washington.","thumbnail_url":"https://www.ebooknetworking.net/books/B00/3YC/bigB003YC1OD8.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B003YC1OD8.html\">Falls of roof in mines operating in the Pittsburgh Coal Bed, West Virginia</a>","width":400,"height":300}