Security control of air traffic.
Series: Advisory circular -- AC no. 99-1B.
Publisher: U.S. Dept. of Transportation, Federal Aviation Administration
Published: 1985
Place of publication: [Washington, D.C.]
Language: eng
Subjects: Air traffic control -- United States -- Security measures.
Notes: Caption title.

Shipping list no.: 85-811-P.

"8/2/85."

Cancels AC 99-1A, dated February 27, 1978.