Columbia subject headings:
Employees--Training of--United States.
Occupational retraining--United States.
Occupational training--United States.
Vocational education--United States.
Harvard subject headings:
Employees--Training of--United States.
Occupational training--United States
Princeton subject headings:
Employees--Training of--United States.
Facsimiles.
Occupational retraining--United States.
Occupational training--United States.
Vocational education--United States.