{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Simplified Method of Tracing Rays: Through Any Optical System of Lenses, Prisms, and Mirrors (Classic Reprint)","author_name":"Ludwik Silberstein","thumbnail_url":"https://www.ebooknetworking.net/books/133/192/big1331929601.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1331929601.html\">Simplified Method of Tracing Rays: Through Any Optical System of Lenses, Prisms, and Mirrors (Classic Reprint)</a>","width":400,"height":300}