Columbia subject headings:
Bilingualism--Wales.
Education, Bilingual--Wales.
Language policy--Wales.
Mass media and language--Wales.
Welsh language--Study and teaching--Wales.
Harvard subject headings:
Bilingualism--Wales.
Education, Bilingual--Wales.
Language policy--Wales.
Mass media and language--Wales.
Welsh language--Study and teaching--Wales.
Princeton subject headings:
Education, Bilingual--Wales.
Welsh language.