{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Vacuum tubes in wireless communication, a practical text book for operators and experimenters","author_name":"Elmer Eustice Bucher","thumbnail_url":"https://www.ebooknetworking.net/books/117/707/big1177070901.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1177070901.html\">Vacuum tubes in wireless communication, a practical text book for operators and experimenters</a>","width":400,"height":300}