LONDONDERRY MAP. Ordnance Survey of Northern Ireland: Londonderry 1:50,000 Map. Sheet 7. Belfast: O.S.N.I., 1982. 2cms to 1 kilometre.[Londonderry, Limavady, Ballykelly, Eglinton, Drumahoe, Carrigans, Burnfoot, Claudy, Artigarvan etc]. Very good in split plastic wallet. IRISH