Columbia subject headings:
Democracy--History--20th century.
Labour Party (Great Britain)--History.
Socialism--Great Britain--History--20th century.
Socialism--Sweden--History--20th century.
Sveriges socialdemokratiska arbetareparti--History.
Harvard subject headings:
Socialism--Great Britain
Socialism--Sweden
Princeton subject headings:
Democracy--History.
Labour Party (Great Britain)--History.
Socialism--Great Britain--History--20th century.
Socialism--Sweden--History--20th century.
Sveriges socialdemokratiska arbetareparti--History.