{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Formal logic, or, The calculus of inference, necessary and probable","author_name":"Augustus De Morgan","thumbnail_url":"https://www.ebooknetworking.net/books/B00/9WZ/bigB009WZFFEK.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B009WZFFEK.html\">Formal logic, or, The calculus of inference, necessary and probable</a>","width":400,"height":300}