Aviation Accidents in South China 1912-1940 - 2nd revision by Lennart Andersson

  http://www.artiklar.z-bok.se/AccidentsSouthChina.html?fbclid=IwAR0L56tO88wNMJmXWgXgkf0bV7nfYg0JV_vC0sDXb9g-xVAdLaVNRx-2FZM