{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Principles of Database & Knowledge-Base Systems, Vol. 1: Classical Database Systems","author_name":"Jeffrey D. Ullman","thumbnail_url":"https://www.ebooknetworking.net/books/071/678/big0716781581.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0716781581.html\">Principles of Database &amp; Knowledge-Base Systems, Vol. 1: Classical Database Systems</a>","width":400,"height":300}