Columbia subject headings:
Proudhon, P.-J. (Pierre-Joseph), 1809-1865.
Republicanism--France--History--19th century.
Socialism--France--History--19th century.
Harvard subject headings:
Proudhon, P.-J. (Pierre-Joseph), 1809-1865.
Republicanism--France--History--19th century.
Socialism--France--19th century.
Socialism--France--History--19th century
Princeton subject headings:
Proudhon, P.-J. (Pierre-Joseph), 1809-1865.
Republicanism--France--History--19th century.
Socialism--France--History--19th century.