{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The Theory of Space, Time and Gravitation","author_name":"V.; Kemmer, N. (trans.) Fock","thumbnail_url":"https://www.ebooknetworking.net/books/B00/0KN/bigB000KNEM9M.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B000KNEM9M.html\">The Theory of Space, Time and Gravitation</a>","width":400,"height":300}