Category:1957 in Groningen (province)
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Constituent states of the Kingdom: Aruba · Netherlands – Caribbean Netherlands:
Provinces of the Netherlands: Drenthe · Flevoland · Friesland · Gelderland · Groningen · Limburg · North Brabant · North Holland · Overijssel · South Holland · Utrecht · Zeeland
English: 1957 in Groningen (province)