{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"A Treatise On Plane and Spherical Trigonometry: Including the Construction of the Auxiliary Tables; a Concise Tract On the Conic Sections, and the Principles of Spherical Projection","author_name":"Enoch Lewis","thumbnail_url":"https://www.ebooknetworking.net/books/114/349/big1143499433.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1143499433.html\">A Treatise On Plane and Spherical Trigonometry: Including the Construction of the Auxiliary Tables; a Concise Tract On the Conic Sections, and the Principles of Spherical Projection</a>","width":400,"height":300}