Columbia subject headings:
Catholic Church--Foreign relations--France.
France--Foreign relations--Catholic Church.
Germany--Foreign relations--Great Britain.
Germany--History--Otto IV, 1208-1214.
Germany--History--Philip of Swabia, 1198-1208.
Great Britain--Foreign relations--Germany.
Great Britain--History--John, 1199-1216.
Holy Roman Empire--History--Otto IV, 1198-1215.
Harvard subject headings:
Great Britain--Foreign relations--Holy Roman Empire.
Great Britain--History--John, 1199-1216
Holy Roman Empire--Foreign relations--Great Britain.
Holy Roman Empire--Foreign relations.
Innocent III, Pope, 1160 or 1161-1216
John, King of England, 1167-1216
Otto IV, Holy Roman Emperor, approximately 1175-1218.
Philip II, King of France, 1165-1223.
Princeton subject headings:
Great Britain--Foreign relations--Holy Roman Empire.
Holy Roman Empire--Foreign relations--Great Britain.
Holy Roman Empire--Foreign relations.
Innocent III, Pope, 1160 or 1161-1216.
John, King of England, 1167-1216.
Otto IV, Holy Roman Emperor, approximately 1175-1218.
Philip II, King of France, 1165-1223.