Operator's manual
Subtitle: Army model HU-1A helicopter (Bell)
Series: Its Technical manual,; TM55-1520-207-10
Published: 1961
Place of publication: [Washington]
Language: eng
Subjects: Bell helicopter
Notes: Cover title.
"Supersedes TM55-1520-207-10, 7 March 1961, including C1, 9 October 1961."