{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Paul Ehrenfest. Volume I: The Making of a Theoretical Physicist","author_name":"Martin J. Klein","thumbnail_url":"https://www.ebooknetworking.net/books/072/040/big0720401631.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0720401631.html\">Paul Ehrenfest. Volume I: The Making of a Theoretical Physicist</a>","width":400,"height":300}