Columbia subject headings:
Constitutional history--Great Britain--Sources.
Great Britain--Constitutional law.
Great Britain--Politics and government.
Magna Carta.
Harvard subject headings:
Constitutional history--Great Britain--Sources
Great Britain--Constitutional law.
Great Britain--Politics and government.
Liberty--Early works to 1800
Princeton subject headings:
Constitutional history--Great Britain--Sources.
Great Britain--Constitutional law.
Great Britain--Politics and government.
Magna Carta.