Ordnance Survey Northern Ireland Town Plan & Tourist Map Series.
Great Britain.Ordnance Survey.
Belfast : Ordnance Survey of Northern Ireland,
[1923-2008].
Relief shown by contour lines, spot heights.
refer to: C20:10(01-08) for index maps to 1:2500 plans, [1937-1967] on 1:63,360 scale.
refer to: C20:10(09-18), district, tourist maps, [1935-1988], scales differ 1:4000 to 1:63,360.
refer to: C20:20, includes town plans for: Armagh, Ballynahinch, Banbridge, Bangor, Belfast, Coleraine, Enniskillen, Lisburn, Londonderry, Newry, Newtownards, Omagh, Portrush, Strabane, [1923-2008], scales differ 1:2500 to 1:25,000.