Columbia subject headings:
Harvard subject headings:
Edward I, King of England, 1239-1307--Relations with Welsh.
Edward I, King of England, 1239-1307.
Great Britain--History--Edward I, 1272-1307
Llywelyn ap Gruffydd, -1282.
Wales--History--1063-1284.
Wales--Kings and rulers--Biography.
Princeton subject headings:
Edward I, King of England, 1239-1307.
Llywelyn ap Gruffydd, -1282.
Wales--History--1063-1536.
Wales--Kings and rulers--Biography.