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English: John Polk Allen (born 6 May 1929, Carnegie, Oklahoma) is a systems ecologist and engineer, metallurgist, adventurer and writer.
John P. Allen 
systems ecologist and engineer, metallurgist, adventurer and writer
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Date of birth6 May 1929
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John Polk Allen (ca); ジョン・P・アレン (ja); John Polk Allen (fr); John P. Allen (it); John P. Allen (en); John Polk Allen (es); John P. Allen (sl); John P. Allen (nl) explorador estadounidense (es); Amerikaans ontdekkingsreiziger (nl); systems ecologist and engineer, metallurgist, adventurer and writer (en); مستكشف من الولايات المتحدة الأمريكية (ar); ദേശപരിവേക്ഷകന്‍ (ml); esplorador estauxunidense (ast) John P. Allen, Johnny Dolphin, John P Allen (es); Johnny Dolphin, John Allen (en)

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