{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Methods of Mine Timbering","author_name":"California State Mining Bureau","thumbnail_url":"https://www.ebooknetworking.net/books/150/278/big1502786184.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1502786184.html\">Methods of Mine Timbering</a>","width":400,"height":300}