Columbia subject headings:
Harvard subject headings:
Bergson, Henri, 1859-1941
Jaurès, Jean, 1859-1914
Péguy, Charles, 1873-1914.
Princeton subject headings:
Bergson, Henri, 1859-1941.
Jaurès, Jean, 1859-1914.
Péguy, Charles, 1873-1914.