Columbia subject headings:
Great Britain--Church history--17th century--Sources.
Great Britain--Politics and government--1642-1660--Sources.
Levellers.
Medicine--Great Britain--History--17th century--Sources.
Harvard subject headings:
Great Britain--Church history--17th century--Sources.
Great Britain--Politics and government--1642-1660--Sources.
Levellers
Medicine--Great Britain--History--17th century--Sources.
Princeton subject headings:
Great Britain--Church history--17th century--Sources.
Great Britain--Politics and government--1642-1660--Sources.
Levellers.
Medicine--Great Britain--History--17th century--Sources.