{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Four-Place Logarithmic Tables: Together with a Table of Natural Sines, Cosines, Tangents, and Cotangents","author_name":"Webster Wells","thumbnail_url":"https://www.ebooknetworking.net/books/B00/AOC/bigB00AOCVU0I.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B00AOCVU0I.html\">Four-Place Logarithmic Tables: Together with a Table of Natural Sines, Cosines, Tangents, and Cotangents</a>","width":400,"height":300}