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==External links== | ==External links== | ||
* [http://www.gasballooning.net/resources.htm A very good resource for information about and instructions for gas | * [http://www.gasballooning.net/resources.htm A very good resource for information about and instructions for gas ballooning]. Has links to couple of (old but good) books available in PDF format. | ||
* [http://www.gasballooning.net/BT-2361.pdf Theory of Ballooning, War Department, 25 Apr, 1940]. The basics in 13 pages. | * [http://www.gasballooning.net/BT-2361.pdf Theory of Ballooning, War Department, 25 Apr, 1940]. The basics in 13 pages. |
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