{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Magnets;: A practical treatise on electromagnetic devices, their circuits, and the specific forms and characteristics of electromagnets and permanent magnets employed","author_name":"Charles Reginald Underhill","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B00085IVHQ.html\">Magnets;: A practical treatise on electromagnetic devices, their circuits, and the specific forms and characteristics of electromagnets and permanent magnets employed</a>","width":400,"height":300}