[Melbourne], Directorate of Training, RAAF, 1944. Volume 1, Number 2, April 1944. The note printed inside the front cover expands on the need for secrecy: 'Copies of the pamphlet must on no account be removed from units, and details of the statistical data must not be permitted to become known... More about Flying Accidents. December 1943, January 1944, February 1944. Secret [cover title