VHF radio frequency assignment plan for aeronautical operations. 
 V.H.F. radio frequency assignment plan for aeronautical operations 

 - [Washington, D.C.,  1977]. 
 - v. 
<br/><br/> 12/12/77.  CRDP Program Historic Shelflist record. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio frequency allocation.
<br/><br/><label>Gov. Doc. Class. No.: </label>TD 4.8/5:90-50 B