Civil Aeronautics Board report into the incident involving Continental Airlines Flight 7 on 1 August 1941.
Civil Aeronautics Board, US Department of Commerce
1942-05-01
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+100)">[1]</a>