00887nam a22002892  4500001001300000003000500013005001700018008004100035040001800076074001400094086002000108099002000128245005000148260003100198300001200229500001400241500002100255500001700276500000900293500008000302500004100382500004400423650004000467710005300507949001800560999001900578hsl001005693DGPO20170826152542.0170109s1970    dcu     r    f000 0 eng d  aGPOcGPOdMvI  a0431-C-040 aTD 4.8/2:7220.1  aTD 4.8/2:7220.100aAir traffic control certification procedures.  a[Washington, D.C.,c1970].  a[55] p.  aHandbook.  a[July 30, 1970].  aCover title.  a4to.  a[Issued with perforations. Cancels AT P 7220.6A, Certification and rating].  aDistribution made by issuing office.  aCRDP Program Historic Shelflist record. 0aAir traffic controlzUnited States.1 aUnited States.bFederal Aviation Administration.  aBEVbFed Docs  c264078d264078