{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Directory of Illinois Mineral Operators, to Accompany Mineral Industries Map, September 1, 1920: Comp. By H. P. Christensen (1921 )","author_name":"Illinois State Geological Survey","thumbnail_url":"https://www.ebooknetworking.net/books/111/251/big1112514031.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1112514031.html\">Directory of Illinois Mineral Operators, to Accompany Mineral Industries Map, September 1, 1920: Comp. By H. P. Christensen (1921 )</a>","width":400,"height":300}