00724nam a22002292  4500001001300000003000500013005001700018008004100035040001800076086002100094099002100115245006900136246007100205260003100276300000700307500001400314500004400328650003200372710005300404949001800457999001900475hsl001006855DGPO20170826152555.0170113s1977    dcu     r    f000 0 eng d  aGPOcGPOdMvI0 aTD 4.8/5:90-50 B  aTD 4.8/5:90-50 B00aVHF radio frequency assignment plan for aeronautical operations.3 aV.H.F. radio frequency assignment plan for aeronautical operations  a[Washington, D.C.,c1977].  av.  a12/12/77.  aCRDP Program Historic Shelflist record. 0aRadio frequency allocation.1 aUnited States.bFederal Aviation Administration.  aBEVbFed Docs  c264543d264543