{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Practical Geodesy: Comprising Chain Surveying, and the Use of Surveying Instruments; Leveling, and Tracing of Contours; Together with Tri","author_name":"J. Butler Williams","thumbnail_url":"https://www.ebooknetworking.net/books/128/750/big1287501966.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1287501966.html\">Practical Geodesy: Comprising Chain Surveying, and the Use of Surveying Instruments; Leveling, and Tracing of Contours; Together with Tri</a>","width":400,"height":300}