{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Theory of Formal Systems. (AM-47) (Annals of Mathematics Studies)","author_name":"Raymond M. Smullyan","thumbnail_url":"https://www.ebooknetworking.net/books/069/108/big069108047X.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-069108047X.html\">Theory of Formal Systems. (AM-47) (Annals of Mathematics Studies)</a>","width":400,"height":300}