National plan for development of the microwave landing system :
June 1978 update.
Washington, D.C. : U.S. Department of Transportation ; 1978]
Microwave landing systems.
Air traffic control > Air traffic control / Equipment.
Prepared by U.S. Federal Aviation Administration, U.S. Department of Defense and U.S. National Aeronautics and Space Administration.
1 v. (various pagings) :
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