(3GdJdHS HGdLQjeI (B/s (3GdeSJTGQ YOdi Ndjd(B.s - (3YOdj Ndjd s ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI ,s, 1989)
(3jTed Ydj GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdbGfhf GdLfGFj s