{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Elements of surveying and levelling; with descriptions of the instruments and the necessary tables","author_name":"Charles Davies","thumbnail_url":"https://www.ebooknetworking.net/books/123/125/big1231257970.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1231257970.html\">Elements of surveying and levelling; with descriptions of the instruments and the necessary tables</a>","width":400,"height":300}