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National Geographic June 1903

$79.95 $53.33

The Tetrahedral Principle in Kite Structure
Alexander Graham Bell explains the geometry behind the strength, lightness, and steady flight of these efficient kites.
The Ziegler Polar Expedition { Mr. Ziegler and the National Geographic Society}
Geographic Notes includes information on the Board of Managers’ meeting and surveys of territory in Alaska, among other topics.

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SKU: NG190306 Category:

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