{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Leveling ; Circular Curves ; Stadia and Plane-Table Surveying ; Topographic Surveying ; Hydrographic Surveying ; United States Land Surveys ; Mapping ; Practical Astronomy","author_name":"","thumbnail_url":"https://www.ebooknetworking.net/books/129/872/big1298727731.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1298727731.html\">Leveling ; Circular Curves ; Stadia and Plane-Table Surveying ; Topographic Surveying ; Hydrographic Surveying ; United States Land Surveys ; Mapping ; Practical Astronomy</a>","width":400,"height":300}