{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Placer Mining ; Surface Arrangements at Ore Mines ; Preliminary Operations ; Ore Mining ; Supporting Excavations ; Assaying - Primary Source Edition","author_name":"Anonymous","thumbnail_url":"https://www.ebooknetworking.net/books/129/486/big1294863053.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1294863053.html\">Placer Mining ; Surface Arrangements at Ore Mines ; Preliminary Operations ; Ore Mining ; Supporting Excavations ; Assaying - Primary Source Edition</a>","width":400,"height":300}