Columbia subject headings:
Socialism--Europe--19th century.
Socialism--Latin America--19th century.
Harvard subject headings:
Europe, Western--Politics and government--19th century.
Latin America--Politics and government--19th century.
Socialism--Europe, Western--History--19th century.
Socialism--Latin America--History--19th century.
Princeton subject headings:
Europe, Western--Politics and government--19th century.
Latin America--Politics and government--19th century.
Socialism--Europe, Western--19th century.
Socialism--Latin America--19th century.