{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Principles of mining: valuation, organization and administration; copper, gold, lead, silver, tin and zinc","author_name":"Herbert Hoover","thumbnail_url":"https://www.ebooknetworking.net/books/117/651/big117651301X.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-117651301X.html\">Principles of mining: valuation, organization and administration; copper, gold, lead, silver, tin and zinc</a>","width":400,"height":300}