Columbia subject headings:
Scandinavia--Politics and government.
Socialism--Scandinavia--History--20th century.
Socialist parties--Scandinavia--History--20th century.
Harvard subject headings:
Scandinavia--Politics and government.
Socialism--Scandinavia--20th century.
Socialism--Scandinavia--History--20th century.
Socialist parties--Scandinavia--History--20th century.
Princeton subject headings:
Scandinavia--Politics and government.
Socialism--Scandinavia--History--20th century.
Socialist parties--Scandinavia--History--20th century.