George Nissen and the Trampoline – Lichtenberger Engineering Library
GM Extreme Trampoline – Standard – Nissen Leisure Limited
Like-New Refurbished Equipment for Sale – Elite Trampoline Equipment
Dian Nissen - Wikipedia
The Weird, Forgotten, Awesome Sport of Spaceball - Atlas Obscura
The History of the Trampoline
Biography of George Nissen
Trampoline inventor lived to see his Olympic dream | Local News | gvnews.com
Just Bounce Trampoline Club - DID YOU KNOW? The modern day trampoline was invented by George Nissen and Larry Griswold around 1934! The idea was formed after attending the circus in 1930,
George Nissen: Inventor of the trampoline | The Independent | The Independent
Like-New Refurbished Equipment for Sale – Elite Trampoline Equipment
Time Machine: George Nissen, trampoline inventor | The Gazette
Like-New Refurbished Equipment for Sale – Elite Trampoline Equipment