{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Spiral Structure in Galaxies: A Density Wave Theory","author_name":"G Bertin, C C Lin","thumbnail_url":"https://www.ebooknetworking.net/books/026/202/big0262023962.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0262023962.html\">Spiral Structure in Galaxies: A Density Wave Theory</a>","width":400,"height":300}