Columbia subject headings:
Great Britain--Politics and government--1642-1660.
Levellers--History--17th century.
Socialism--England--History--17th century.
Harvard subject headings:
Great Britain--Politics and government--1642-1660.
Levellers--History--17th century.
Levellers.
Socialism--England--History--17th century.
Socialism--Great Britain--17th century.
Princeton subject headings:
Great Britain--Politics and government--1642-1660.
Levellers--History--17th century.
Socialism--England--History--17th century.