Columbia subject headings:
Harvard subject headings:
Child labor--Law and legislation--European Union countries.
Child labor--Law and legislation--Portugal.
Children--Legal status, laws, etc.--Portugal
Civil rights--Portugal
European Social Charter
Human rights--Portugal.
Princeton subject headings:
Child labor--Law and legislation--Portugal.
Children--Legal status, laws, etc.--Portugal.
Civil rights--Portugal.
European Social Charter
Human rights--Portugal.