Demonstration of the unions NVV and NKV Groningen Right with flag Adri Bean (NVV), center Harry Heath (NVV), with board NKV Wim Spit Date: april 17, 1971 Location: Groningen (prov.), Groningen (city) Keywords: demonstrations, protesters, banners, trade unions, flags Person Name: Boon, Adri de, Heath, Harry ter Spit, Wim Institution Name: NKV, NVV, NVV, NKV

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