Ballooning
Nuttall's Standard Dictionary of the English Language · 1890 · p. 15
bal-loon' -ing, Balloonery, bal-loon'-e-re, s. the management of balloons.
Bu kavram başka kaynaklarda da geçiyor
A Dictionary of Aviation (1911)
The American Dictionary and Cyclopedia (1910)
An Illustrated Dictionary of Medicine, Biology and Allied Sciences (1907)
Smith's Financial Dictionary (1903)
An Illustrated Encyclopaedic Medical Dictionary (1891)
ballooning-school
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A Dictionary of Aviation (1911)
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