{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"A treatise on the principles and practice of levelling, showing its application to purposes of railway engineering and the construction of roads, &c.","author_name":"Michigan Historical Reprint Series","thumbnail_url":"https://www.ebooknetworking.net/books/142/551/big142551376X.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-142551376X.html\">A treatise on the principles and practice of levelling, showing its application to purposes of railway engineering and the construction of roads, &amp;c.</a>","width":400,"height":300}