{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Design and development of precast concrete mine supports: a progress report","author_name":"George T. Krempasky","thumbnail_url":"https://www.ebooknetworking.net/books/B00/412/bigB0041231PO.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0041231PO.html\">Design and development of precast concrete mine supports: a progress report</a>","width":400,"height":300}