{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The magnetic circuit in theory and practice","author_name":"H Du Bois","thumbnail_url":"https://www.ebooknetworking.net/books/B00/9Y5/bigB009Y51D08.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B009Y51D08.html\">The magnetic circuit in theory and practice</a>","width":400,"height":300}