Columbia subject headings:
Harvard subject headings:
Ireland--History--To 1172--Chronology.
Irish language--Middle Irish, 1100-1550--Texts.
Irish language--To 1100--Texts.
Ulster (Northern Ireland and Ireland)--Chronology.
Princeton subject headings:
Ireland--History--To 1172--Chronology.
Irish language--Middle Irish, 1100-1550--Texts.
Irish language--To 1100--Texts.