Παραπομπή APA

(1954). Census of population 1951: County and County Borough of Londonderry. Belfast: Her Majesty's Stationery Office.

Παραπομπή Chicago Style

Census of Population 1951: County and County Borough of Londonderry. Belfast: Her Majesty's Stationery Office, 1954.

Παραπομπή MLA

Census of Population 1951: County and County Borough of Londonderry. Belfast: Her Majesty's Stationery Office, 1954.

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