{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Formal Logic: The Calculus of Inference, Necessary and Probable","author_name":"de Morgan, Augustus","thumbnail_url":"https://www.ebooknetworking.net/books/141/020/big1410207323.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1410207323.html\">Formal Logic: The Calculus of Inference, Necessary and Probable</a>","width":400,"height":300}