Bureau of Air Commerce (part of the U.S. Department of Commerce, U.S. Federal Government) report into the investigation of the crash of a Varney Air Transport aircraft on 1 May 1935.
Bureau of Air Commerce
1935
National Transportation Library, U.S. Department of Transportation. <a rel="nofollow" class="external free" href="https://rosap.ntl.bts.gov/view/dot/32946">https://rosap.ntl.bts.gov/view/dot/32946</a>