> Multivolume work
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4:
General aviation dynamics 4 Data base / M. A. Duffy .. U.S. Department of Transportation, Federal Aviation Administration, Office of Aviation Policy
Washington, DC: Department of Transportation, FAA, 19XX-
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2:
General aviation dynamics 2 Research methodology / M. A. Duffy .. U.S. Department of Transportation, Federal Aviation Administration, Office of Aviation Policy
Washington, DC: Department of Transportation, FAA, 19XX-