{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Alluvial Mining: The geology, technology and economics of placers","author_name":"E. MacDonald","thumbnail_url":"https://www.ebooknetworking.net/books/940/175/big9401753636.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-9401753636.html\">Alluvial Mining: The geology, technology and economics of placers</a>","width":400,"height":300}