Columbia subject headings:
Manpower--United States.
Technical education--United States.
Technology--United States.
United States--Armed Forces--Recruiting, enlistment, etc.
Harvard subject headings:
Manpower--United States.
Technical education--United States.
Technology--United States
United States--Armed Forces--Recruiting, enlistment, etc.
Princeton subject headings:
Manpower--United States.
Technical education--United States.
Technology--United States.
United States--Armed Forces--Recruiting, enlistment, etc.