National airspace system
Subtitle: in-flight assistance operational concept, NAS-SR-1328
Contributors: United States. Federal Aviation Administration
Series: NAS-SR -- 1328
Publisher: U.S. Dept. of Transportation, Federal Aviation Administration
Published: 1988
Place of publication: [Washington, D.C.]
Language: eng
Subjects: Airports -- United States -- Traffic control; Air traffic control -- United States -- Planning
Other titles: In-flight assistance operational concept, NAS-SR-1328
Notes: Cover title

Shipping list no.: 90-0350-P

"September 1988."