{"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 (Classic Reprint)","author_name":"Enoch Lewis","thumbnail_url":"https://www.ebooknetworking.net/books/B00/8K8/bigB008K82V0G.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B008K82V0G.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 (Classic Reprint)</a>","width":400,"height":300}