Duval Constant

CONSTANT LEON DUVAL

1908	1914	1915	1919
1919	1920 ca	1920 ca	1920
1920 ca	1920 ca	1920 ca	1920 ca
1920 ca	1920 ca	1920	1920 ca
1920 ca	1920	1921	1922 ca
1922	1923	1923	1924
1924	1925 ca	1925	1925 ca
1926	1927	1927	1928
1934