Source et copyright
Source: Parliamentary Debates. House of Commons. Official Report. First session of the Forty-Fifth Parliament of the United Kingdom of Great Britain and Northern Ireland. Twentieth year of the reign of her Majesty Queen Elizabeth II. Dir. of publ. Hansard. 1970-1971, No 821; fifth series. London: Her Majesty's Stationery Office. "United Kingdom and European Communities", p. 1542-1460; 1465-1469.
Copyright: Crown copyright is reproduced with the permission of the Controller of Her Majesty's Stationery Office and the Queen's Printer for Scotland