Aviation safety :
serious problems continue to trouble the air traffic control work force /
United States General Accounting Office.
|Corporate Author:||United States.|
Washington, D.C. : U.S. General Accounting Office, 
United States. /
Federal Aviation Administration.
Air traffic control > Air traffic control / United States > Air traffic control / United States / Evaluation.
Air traffic controllers > Air traffic controllers / United States.
"Report to Congressional requesters."
57 p. :
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||University of Illinois at Urbana-Champaign|