The US Army Transportation School apprenticeship program for the trade of helicopter mechanic
Series: Department of the Army pamphlet -- 621-91; DA pam -- 621-91
Publisher: Headquarters, Dept. of the Army
Published: 1981
Place of publication: Washington, DC
Language: eng
Subjects: US Army Transportation School -- Curricula; Helicopters -- Maintenance and repair; Mechanics (Persons)
Notes: "This pamphlet supersedes DA Pam 621-91, 11 October 1977."

"15 July 1981."