{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The Earth's Magnetic Field: Its History, Origin and Planetary Perspective","author_name":"Ronald T. Merrill","thumbnail_url":"https://www.ebooknetworking.net/books/012/491/big0124912427.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0124912427.html\">The Earth&#039;s Magnetic Field: Its History, Origin and Planetary Perspective</a>","width":400,"height":300}