The making of a Pathfinder : World War II letters from a navigator F/O Douglas Knight Williams, DFC /
Williams, Douglas Knight,-1944.
Hill, Mary M.
Braunton, Devon : Merlin Books,
1992.
Williams, Douglas Knight, -1944
Hill, Mary M.
Great Britain. Royal Air Force. Pathfinder Force
Flight navigators, Military
World War, 1939-1945