Columbia subject headings:
Harvard subject headings:
Barbusse, Henri, 1873-1935.
Bredel, Willi, 1901-1964.
Zola, Émile, 1840-1902
Princeton subject headings:
Barbusse, Henri, 1874-1935.
Bredel, Willi, 1901-1964.
Zola, Émile, 1840-1902.