Columbia subject headings:
Labor laws and legislation.
Labor unions--Moral and ethical aspects.
Law--Philosophy.
Personalism.
Wages--Moral and ethical aspects.
Work--Moral and ethical aspects.
Working class.
Harvard subject headings:
Labor laws and legislation
Labor movement.
Labor unions.
Labor.
Wages.
Work.
Working class.
Princeton subject headings:
Labor laws and legislation.
Labor unions.
Labor.
Wages.
Work.