Civil Aeronautics Board report into the accident involving American Airlines Flight 2 on 21 June 1941.
Civil Aeronautics Board, US Department of Commerce
1942-05-10
US Department of Transportation Special Collections <a rel="nofollow" class="external autonumber" href="http://specialcollection.dotlibrary.dot.gov/Document?db=DOT-AIRPLANEACCIDENTS&amp;query=(select+94)">[1]</a>