{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Contributions To Photographic Optics","author_name":"O. Lummer","thumbnail_url":"https://www.ebooknetworking.net/books/140/678/big1406782874.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1406782874.html\">Contributions To Photographic Optics</a>","width":400,"height":300}