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David Hempleman-Adams was born in 1956.
If one flies at high altitude the air gets thinner, that is, there is less of it. If one wants to have enough oxygen, he will need a mask.
George Hempleman has written:
'The Piraki log (E Pirangi ahau koe) or, Diary of Captain Hempleman' -- subject(s): Accessible book
David Morgan Adams died in 1942.
David Morgan Adams was born in 1875.