{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Variational Principles in Physics","author_name":"Jean-Louis Basdevant","thumbnail_url":"https://www.ebooknetworking.net/books/144/192/big1441922792.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1441922792.html\">Variational Principles in Physics</a>","width":400,"height":300}