{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Block-caving mining methods and costs Bagdad Mine, Bagdad Copper Corp. Yavapai County, Ariz","author_name":"W. R. Hardwick","thumbnail_url":"https://www.ebooknetworking.net/books/B00/3HK/bigB003HKQ9BY.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B003HKQ9BY.html\">Block-caving mining methods and costs Bagdad Mine, Bagdad Copper Corp. Yavapai County, Ariz</a>","width":400,"height":300}