{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The Railroad Spiral: The Theory of the Compound Transition Curve Reduced to Practical Formulæ Rules for Application in Field Work; Multiform Complete ... for Five Hundred Spirals (Classic Reprint)","author_name":"William Henry Searles","thumbnail_url":"https://www.ebooknetworking.net/books/B00/8LR/bigB008LRG8ZU.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B008LRG8ZU.html\">The Railroad Spiral: The Theory of the Compound Transition Curve Reduced to Practical Formulæ Rules for Application in Field Work; Multiform Complete ... for Five Hundred Spirals (Classic Reprint)</a>","width":400,"height":300}