Air traffic control
Subtitle: voice communications system continues to encounter difficulties : report to congressional requesters
By: United States General Accounting Office
Publisher: The Office
Published: 1989
Place of publication: Washington, D.C
Language: eng
Number of pages: 15
Subjects: United States. -- Federal Aviation Administration -- Communication systems; Aeronautics -- United States -- Communication systems; Air traffic control -- United States
Other titles: Voice communications system continues to encounter difficulties
Notes: Cover title

Distributed to depository libraries in microfiche

"June 1989."

"GAO/IMTEC-89-39."

"B-234691"--P. 1

Includes bibliographical references