{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Technical Notes National Advisory Committee For Aeronautics No. 238 Propeller Design A Simple Method For Determining The Strength Of Propellers - IV","author_name":"Fred E. Weick","thumbnail_url":"https://www.ebooknetworking.net/books/B00/AGL/bigB00AGLNQVI.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B00AGLNQVI.html\">Technical Notes National Advisory Committee For Aeronautics No. 238 Propeller Design A Simple Method For Determining The Strength Of Propellers - IV</a>","width":400,"height":300}