Columbia subject headings:
Celts--Scotland.
Civilization, Celtic.
Scotland--Civilization.
Scottish Gaelic philology.
Harvard subject headings:
Celts--Scotland.
Civilization, Celtic.
Scotland--Civilization.
Scottish Gaelic philology.
Princeton subject headings:
Celts--Scotland--History.
Civilization, Celtic.
Scotland--Civilization.
Scotland--Languages.
Scottish Gaelic language--Scotland.