MARYLAND

All the World's Aircraft · 1913 · p. 203

*Aero Club of Baltimore, Col. Jerome H. Joyce, Pres., Baltimore

Bu kavram başka kaynaklarda da geçiyor

Nuttall Encyclopedia (1907)
Encyclopedic Dictionary of American Reference (1901)
Chandler's Encyclopedia (1898)
Phrases and Names Their Origins and Meanings (1896)
A Military Dictionary and Gazetteer (1881)
Zell's Condensed Dictionary (1879)

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