https://api.parliament.uk/historic-hansard/written-answers/1973/nov/07/european-social-charter
European Social Charter (Hansard, 7 November 1973)
European Social Charter (Hansard, 7 November 1973)
european social charterhansardnovember
https://book.coe.int/en/online-bookshop/5180-the-european-social-charter-its-protocols-the-revised-charter.html
The European social Charter, its protocols, the revised Charter
european social charterprotocolsrevised