Bryan, C. (2001). The national geographic society: 100 years of adveenture and discovery. Harry N. Abrams.
Tohutoru Kātū Chicago (17th ed.)Bryan, C.D.B. The National Geographic Society: 100 Years of Adveenture and Discovery. New York: Harry N. Abrams, 2001.
Tohutoro MLA (9th ed.)Bryan, C.D.B. The National Geographic Society: 100 Years of Adveenture and Discovery. Harry N. Abrams, 2001.
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