Registration 57th International four-day Nijmegen, thirteen-year-old triplets Pluymakers from Maastricht Date: 16 July 1973 Location: Maastricht, Nijmegen Keywords: triples, group portraits, girls, hikers, hiking tours Personal name: Pluymakers Institution name: Four day

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Photo credit: © BNA Photographic / Alamy / Afripics
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