{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"C.Lanczos's The Variational Principles 4th (Fourth) edition(The Variational Principles of Mechanics (Dover Books on Physics and Chemistry) [Paperback])(1986)","author_name":"C.Lanczos","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B003VAW9YG.html\">C.Lanczos&#039;s The Variational Principles 4th (Fourth) edition(The Variational Principles of Mechanics (Dover Books on Physics and Chemistry) [Paperback])(1986)</a>","width":400,"height":300}