{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Railroad Track Mechanics and Technology: Proceedings of a Symposium Held at Princeton University, April 21 - 23, 1975","author_name":"","thumbnail_url":"https://www.ebooknetworking.net/books/148/317/big1483172406.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1483172406.html\">Railroad Track Mechanics and Technology: Proceedings of a Symposium Held at Princeton University, April 21 - 23, 1975</a>","width":400,"height":300}