GSGS (Series) ; 4521. GSGS (Series) ; 4072. 3rd ed. "Published at the War Office, 1940." "Compiled and drawn at War Office, 1940. Heliographed Ordnance Survey, 1940." "Overprint drawn at G.S.G.S.(A.M.) October 1944." "Projection. Europe (Air) conical orthomorphic (central zone)". Part of the Gordon Griffith fonds.