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The Importance of Understanding History
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Who Made That Trampoline? - The New York Times
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George Nissen and the Trampoline – Lichtenberger Engineering Library
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The History of the Trampoline
77a Trampoline – Standard – Nissen Leisure Limited
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Time Machine: George Nissen, trampoline inventor | The Gazette
How the Trampoline Came to Be | Innovation| Smithsonian Magazine
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Trampoline History Blog: A Brief History of World Trampoline - - Leading Up to the 1964 First World Championships
Did You Know The Trampoline Was Invented In This Iowa Town?
How the Trampoline Came to Be | Innovation| Smithsonian Magazine
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