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Australian Geographic – March-April 2013
National Geographic USA – Answer Book
National Geographic France – Hors Serie 1 2012
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National Geographic USA – May 2009
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National Geographic USA – September 2011
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National Geographic Germany – November 2011
National Geographic France – Fevrier 2013
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National Geographic USA – October 2010
National Geographic USA – HEINLE Reading Explorer 1 2009
National Geographic USA – October 2011
National Geographic USA – June 2009
National Geographic USA – June 2010
National Geographic USA – February 2012
Australian Geographic – January-February 2013
National Geographic USA – March 2011
National Geographic USA – February 2011
