{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Introduction to combinatorial mathematics","author_name":"C. L Liu","thumbnail_url":"https://www.ebooknetworking.net/books/B00/06B/bigB0006BVDWM.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0006BVDWM.html\">Introduction to combinatorial mathematics</a>","width":400,"height":300}