{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Propagation of Radio Waves at Frequencies Below 300Kc/s (Agardograph)","author_name":"","thumbnail_url":"https://www.ebooknetworking.net/books/008/010/big0080102689.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0080102689.html\">Propagation of Radio Waves at Frequencies Below 300Kc/s (Agardograph)</a>","width":400,"height":300}