Catalog Record: Air traffic control : voice communications...

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

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

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