Catalog Record: Air traffic control : voice communications system continues to encounter difficulties : report to Congressional requesters | HathiTrust Digital Library

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Air traffic control :
voice communications system continues to encounter difficulties : report to Congressional requesters.

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Corporate Author: United States.
Language(s): English
Published: Washington, D.C. : U.S. General Accounting Office, [1989]
Subjects: Switching circuits
Air traffic control > Air traffic control / Communication systems.
Note: "B-234691"--P. 1.
"June 1989."
Cover title.
Physical Description: 15 p. ; 28 cm.
Locate a Print Version: Find in a library

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  • University of Illinois at Urbana-Champaign
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