Civil Aeronautics Board accident investigation report into the crash of a Boeing company test flight on 19 October 1959.
Civil Aeronautics Board, US Department of Commerce
1960-06-20
US Department of Transportation, Special Collection <a rel="nofollow" class="external autonumber" href="http://specialcollection.dotlibrary.dot.gov/Document?db=DOT-AIRPLANEACCIDENTS&amp;query=(select+682)">[1]</a>