{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The general theory of blade screws: Including propellers, fans, helicopter screws, helicodal pumps, turbo-motors, and different kinds of helicodal ... National Advisory Committee for Aeronautics)","author_name":"George de Bothezat","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0008CPLEK.html\">The general theory of blade screws: Including propellers, fans, helicopter screws, helicodal pumps, turbo-motors, and different kinds of helicodal ... National Advisory Committee for Aeronautics)</a>","width":400,"height":300}