Northern Ireland. General Register Office.

• Census of population of Northern Ireland, 1951
• (Census of population, 1981)
• Access to birth records
• Annual report of the Registrar General
• Census of Northern Ireland, 1926
• Census of population
• Census of population 1966, preliminary report
• Census of population 1971, migration tables, Northern Ireland
• Census of population of Northern Ireland, 1937
• Census of population of Northern Ireland, 1951
• CENSUS OF POPULATION OF NORTHERN IRELAND, 1951 - COUNTY AND COUNTY BOROUGH OF LONDONDERRY
• CENSUS OF POPULATION OF NORTHERN IRELAND, 1961