{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"A treatise on surveying, containing the theory and practice: To which is prefixed a perspicuous system of plane trigonometry. The whole clearly ... to the use of schools. By John Gummere","author_name":"John Gummere","thumbnail_url":"https://www.ebooknetworking.net/books/B00/2YD/bigB002YD9CSC.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B002YD9CSC.html\">A treatise on surveying, containing the theory and practice: To which is prefixed a perspicuous system of plane trigonometry. The whole clearly ... to the use of schools. By John Gummere</a>","width":400,"height":300}