{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Appendix to Swineford's History of the Lake Superior Iron District: Being a Review of Its Mines and Furnaces for 1872 (1872)","author_name":"Alfred P. Swineford","thumbnail_url":"https://www.ebooknetworking.net/books/116/194/big1161941584.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1161941584.html\">Appendix to Swineford&#039;s History of the Lake Superior Iron District: Being a Review of Its Mines and Furnaces for 1872 (1872)</a>","width":400,"height":300}