Special study
Subtitle: review of rotorcraft accidents, 1977-1979
By: National Transportation Safety Board
Contributors: United States. National Transportation Safety Board
Publisher: The Board; National Technical Information Service [distributor]
Published: 1981
Place of publication: Washington, D.C; Springfield, Va
Language: eng
Number of pages: 57
Subjects: Aircraft accidents -- United States
Other titles: Review of rotorcraft accidents, 1977-1979
Notes: Cover title

"NTSB-AAS-81-1."