(3bQBf cQjes ((3GdbGgQI (B:s (3GdeWHYI hGdecJHI GdSYjOjI,s, 1900)
. 240-220 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3JaSjQ GdbQBfs; (3GdTQjYI GdESdGejIs