GSGS (Series); 2871. 1st ed. "Projection of the International Map." "Compiled from Admiralty Charts 721 and 2762 dated 1938 and 1940." "Drawn and printed by E.A. Survey Group, Feb. 1942. Heliographed by O.S. 1942."
Downloads available under Creative Commons Attribution-NonCommercial 2.5 License