{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The a B C of Vacuum Tubes, in Radio Reception, an Elementary and Practical Book on the Theory and Operation of Vacuum Tubes, As Detectors and Amplifiers (Classic Reprint)","author_name":"E. H. Lewis","thumbnail_url":"https://www.ebooknetworking.net/books/B00/8NB/bigB008NB4Z6I.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B008NB4Z6I.html\">The a B C of Vacuum Tubes, in Radio Reception, an Elementary and Practical Book on the Theory and Operation of Vacuum Tubes, As Detectors and Amplifiers (Classic Reprint)</a>","width":400,"height":300}