{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The Equivalence of Universal Relation Definitions","author_name":"Jeffrey D. Ullman","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B00BVD6Y4G.html\">The Equivalence of Universal Relation Definitions</a>","width":400,"height":300}