Operating unmanned aircraft systems in the national airspace system : assessing research and development efforts to ensure safety : hearing before the Subcommittee on Oversight, Committee on Science, Space, and Technology, House of Representatives, One Hundred Thirteenth Congress, first session, Friday, February, 15, 2013.
|Format:||Government Document Online Book|
U.S. Government Printing Office,
|Online Access:||ONLINE VERSION|
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