{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"How to Use, Calibrate, Repair and Upgrade Vacuum Tube Testers","author_name":"Popovich, Igor S.","thumbnail_url":"https://www.ebooknetworking.net/books/098/062/big0980622379.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0980622379.html\">How to Use, Calibrate, Repair and Upgrade Vacuum Tube Testers</a>","width":400,"height":300}