Obstruction marking and lighting

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086 0 ⊔ ‡aTD 4.8:Ob 7/1973
110 1 ⊔ ‡aUnited States. ‡bFederal Aviation Administration.
245 1 0 ‡aObstruction marking and lighting.
250 ⊔ ⊔ ‡a[Rev. ed.]
260 ⊔ ⊔ ‡aWashington : ‡bU.S. Dept. of Transportation, Federal Aviation Administration, ‡c1973.
300 ⊔ ⊔ ‡a1 v. (various pagings) : ‡bill. ; ‡c27 cm.
500 ⊔ ⊔ ‡a"This cancels and supersedes Advisory Circular Number 70/7460-1B, dated October 1, 1972."
500 ⊔ ⊔ ‡aIncludes appendices.
500 ⊔ ⊔ ‡aIssued December 1973.
500 ⊔ ⊔ ‡a"AC 70/7460-1C."
500 ⊔ ⊔ ‡aCover title.
538 ⊔ ⊔ ‡aMode of access: Internet.
650 ⊔ 0 ‡aAids to air navigation ‡xStandards ‡zUnited States.
650 ⊔ 0 ‡aAirways ‡xLighting ‡xStandards ‡zUnited States.
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