00656nam a22002292  4500001001300000003000500013005001700018008004100035040001800076086002000094099002000114245004800134260003100182300000700213500002300220500001300243500004400256650003600300710005300336949001800389999001900407hsl001006497DGPO20170826152552.0170112s1984    dcu     r    f000 0 eng d  aGPOcGPOdMvI0 aTD 4.8/5:20-120  aTD 4.8/5:20-12000aNondirectional beacon frequency congestion.  a[Washington, D.C.,c1984].  av.  aAdvisory circular.  a6/18/84.  aCRDP Program Historic Shelflist record. 0aRadioxReceivers and reception.1 aUnited States.bFederal Aviation Administration.  aBEVbFed Docs  c264390d264390