Air traffic control
Subtitle: voice communications system challenges continue : report to the Chairman, Subcommittee on Transportation and Related Agencies, Committee on Appropriations, U.S. Senate
By: United States General Accounting Office.
Publisher: The Office; The Office [distributor
Published: 1991
Place of publication: Washington, D.C; Gaithersburg, MD (P.O. Box 6015, Gaithersburg 20877)
Language: eng
Format: Microform
Subjects: United States. -- Federal Aviation Administration.; Air traffic control -- United States -- Automation.
Other titles: Voice communications system challenges continue.
Notes: Cover title.

Distributed to depository libraries in microfiche.

Shipping list no.: 92-2159-M.

"August 1991."

"GAO/IMTEC-91-49."

"B-234691"--P. 1.

Includes bibliographical references.

Microfiche. [Washington, D.C.] : U.S. General Accounting Office, [1992?] 1 microfiche : negative.