Safety in and around helicopters.
Series: AC ; 91-32 A; AFS-820; AFS (Series) (United States. Federal Aviation Administration. Office of Flight Standards) -- 820.
Publisher: Dept. of Transportation, Federal Aviation Administration
Published: 1979
Place of publication: Washington
Language: eng
Subjects: Helicopters -- Safety measures.
Notes: "Advisory circular."

June 21, 1979.