Columbia subject headings:
Manpower policy--United States--Abstracts.
Working class--United States--Abstracts.
Harvard subject headings:
Employees--Training of--United States--Abstracts.
Manpower policy--United States--Abstracts.
Working class--United States--Abstracts.
Princeton subject headings:
Employees--Training of--United States--Abstracts.
Manpower policy--United States--Abstracts.