{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"An introduction to the present practice of surveying and levelling ; With an appendix, containing such arithmetical rules and examples as are necessary for the explanation of the subject","author_name":"A Civil Engineer","thumbnail_url":"https://www.ebooknetworking.net/books/113/033/big1130335534.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1130335534.html\">An introduction to the present practice of surveying and levelling ; With an appendix, containing such arithmetical rules and examples as are necessary for the explanation of the subject</a>","width":400,"height":300}