GSGS (Series) ; 4521. GSGS (Series) ; 4072. "Published by War Office 1940". "Compiled and drawn at War Office, 1940. Heliographed Ordnance Survey 1941." "Overprint drawn at G.S.G.S.(A.M.) November 1944." "Projection. Europe (Air) conical orthomorphic (central zone)". Part of the Gordon Griffith fonds.