Columbia subject headings:
Great Britain--Languages.
Ireland--Languages.
Sociolinguistics--Great Britain.
Sociolinguistics--Ireland.
Harvard subject headings:
Great Britain--Languages.
Ireland--Languages.
Sociolinguistics--Great Britain.
Sociolinguistics--Ireland.
Princeton subject headings:
Great Britain--Languages.
Ireland--Languages.
Sociolinguistics--Great Britain.
Sociolinguistics--Ireland.