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Google圖書搜尋
CAA Approved Ground and Flight Schools
United States. Civil Aeronautics Administration
出版
Department of Commerce, Civil Aerounatics Administration, Schools and Training Section
, 1947
URL
http://books.google.com.hk/books?id=kENU9RX_tjQC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN