{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Focusing properties of inhomogeneous magnetic sector fields","author_name":"M. M. Bretscher","thumbnail_url":"https://www.ebooknetworking.net/books/B00/40N/bigB0040NO93C.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0040NO93C.html\">Focusing properties of inhomogeneous magnetic sector fields</a>","width":400,"height":300}