{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Structural Models: An Introduction to the Theory of Directed Graphs.","author_name":"Frank, Robert Z. Norman, and Dorwin Cartwright. Harary","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0000CMU0R.html\">Structural Models: An Introduction to the Theory of Directed Graphs.</a>","width":400,"height":300}