Scurvy and Canadian exploration.
Houston
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CS
D002170:Canada; D005101:Expeditions / Q000266:history*; D049690:History, Ancient; D049692:History, Early Modern 1451-1600; D049691:History, Medieval; D049711:History, Modern 1601-; D012614:Scurvy / Q000266:history*; D014195:Travel / Q000266:history*