GSGS (Series) ; 3957. 4th ed., Military ed. Transverse Mercator proj. "First published by the Director General, at the Ordnance Survey Office, Southampton, 1935, with periodical corrected reprints." "Air information correct to 30.1.39." Stamped in red, "Not to be published." Stamped, "Orderly Room, 3, CDN. Construction, COY., R.C.E."
