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Google圖書搜尋
The U.S. Air Service in World War I.
United States. Air Force. Office of Air Force History
其他書名
Early concepts of military aviation
出版
Albert F. Simpson Historical Research Center Maxwell AFB
, 1978
URL
http://books.google.com.hk/books?id=7R0SzQEACAAJ&hl=&source=gbs_api