Ordnance Survey of Northern Ireland One-inch Series : 3rd edition (Ministry of Defence).
Ordnance Survey of Northern Ireland.
[London] : D. Survey, Ministry of Defence United Kingdom,
1965-73.
Relief shown by contour lines, hypsometric tinting and spot heights.
Sheet 1. North Coast (Ed. 1, 1965 ; Ed. 2, 1969 [rep. 1970, rep. 1972] ; Ed. 3, 1973) -- Sheet 2. Londonderry (Ed. 1, 1965 ; Ed. 2, 1969 [rep. 1969, rep. 1971, rep. 1972]) -- Sheet 3. Mid Antrim (Ed. 1, 1965 ; Ed. 2, 1969 [rep. 1969] ; Ed. 3, 1971 [rep. 1971, rep. 1972, rep. 1973]) -- Sheet 4. Omagh (Ed. 1, 1965 ; Ed.2, [1969] [rep. 1970, rep. 1972]) -- Sheet 5. East Tyrone (Ed. 1, 1965 [rep. 1969] ; Ed. 2, [1969] [rep. 1970, rep. 1971, rep. 1972, rep. 1973]) -- Sheet 6. Belfast (Ed. 1, 1965 ; Ed. 2, 1969 [rep. 1970] ; Ed. 3, 1971 [rep. 1972, rep. 1973]) -- Sheet 7. Enniskillin (Ed. 1, 1965 [rep. 1969] ; Ed. 2, [1970] [rep. 1971, rep. 1972, rep. 1973]) -- Sheet 8. Armagh (Ed. 1, 1965 ; Ed. 2, [1969] [rep. 1971, rep. 1972, rep. 1973]) -- Sheet 9. South Down (Ed. 1, 1965 ; Ed. 2, 1969 [rep. 1969, rep. 1970, rep. 1971, rep. 1972]).