{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Inside the sperry lower ball turret.(Brief Article): An article from: Airpower","author_name":"Frederick A. Johnsen","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0009FQBPE.html\">Inside the sperry lower ball turret.(Brief Article): An article from: Airpower</a>","width":400,"height":300}