Columbia subject headings:
Cromwell, Richard, 1626-1712.
Great Britain--History--Commonwealth and Protectorate, 1649-1660.
Harvard subject headings:
Cromwell, Richard, 1626-1712.
Great Britain--History--Commonwealth and Protectorate, 1649-1660.
Princeton subject headings:
Cromwell, Richard, 1626-1712.
Great Britain--History--Commonwealth and Protectorate, 1649-1660.