Columbia subject headings:
Leroux, Pierre, 1797-1871.
Liberalism--Italy--History--19th century.
Mazzini, Giuseppe, 1805-1872.
Socialism--France--History--19th century.
Harvard subject headings:
Leroux, Pierre, 1797-1871.
Liberalism--Italy--History--19th century.
Mazzini, Giuseppe, 1805-1872.
Socialism--France--History--19th century
Princeton subject headings:
Leroux, Pierre, 1797-1871.
Liberalism--Italy--History--19th century.
Mazzini, Giuseppe, 1805-1872.
Socialism--France--History--19th century.