Columbia subject headings:
Celts--Scotland--History.
Celts--Scotland--Kings and rulers.
Scotland--History--To 1057.
Scotland--Kings and rulers.
Harvard subject headings:
Celts--Scotland--History.
Celts--Scotland--Kings and rulers.
Scotland--History--To 1057.
Scotland--Kings and rulers.
Princeton subject headings:
Celts--Scotland--History.
Celts--Scotland--Kings and rulers.
Scotland--History--To 1057.
Scotland--Kings and rulers.