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National Geographic Magazine 1983-12, December
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National Geographic Magazine 1973-07, July
National Geographic Magazine 1984-03, March
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National Geographic Magazine 1989-02, February
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National Geographic Magazine 1987-09, September
National Geographic Magazine 1973-01, January
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National Geographic Magazine 1980-05, May
National Geographic Magazine 1986-04, April
National Geographic Magazine 1982-10, October
National Geographic Magazine 1979-04, April
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National Geographic USA – January 2014
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National Geographic Magazine 1982-08, August
National Geographic 1996-04, April
National Geographic 1993-05, May
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National Geographic Magazine 1972-09, September
National Geographic Magazine 1980-11, November
National Geographic Magazine 1976-06, June
National Geographic Magazine 1975-08, August
National Geographic Magazine 1984-10, October
National Geographic Magazine 1985-02, February
National Geographic Magazine 1979-06, June
National Geographic Magazine 1986-09, September
National Geographic Magazine 1973-12, December
