(3GdfXQjI GdYGeI ddbGfhf GdLfGFi (B/s - (3QeSjS HgfGes ((3GdCScfOQjI (B:s (3efTCI GdeYGQa ,s, 1997)
(3jTJed Ydj GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdbGfhf GdLfGFjs