https://www.wikidata.org/wiki/Q315143?uselang=cy
John Boyd Orr, Barwn 1af Boyd-Orr - Wikidata
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https://www.timeshighereducation.com/books/speaking-volumes-john-boyd-orrs-food-and-the-people/160007.article
Speaking Volumes: John Boyd Orr's Food and the People | Times Higher Education (THE)
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