GSGS (Series) ; 4534. GSGS (Series) ; 4369. 5th ed. "Ordnance survey of Great Britain (Aeronautical map) 1:500,000 R.A.F. (war)" "Overprint drawn at G.S.G.S.(A.M.) December 1944." "Compiled on a modified polyconic projection based on the international 1:1,000,000 Map) from the Ordnance Survey". Part of the Gordon Griffith fonds.