(3GdcJGH GdCHjV Yf bVjI WGHG(B:s (3GdfRGY Mhd HYV YdGeGJ GdMOhO Hjf LeghQjI eUQ GdYQHjI h OhdI GSQGFd (B/ s - (3hRGQI GdNGQLjIs ((3GdbGgQI(B:s (3hRGQI GdNGQLjI,s, 1989)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdMOhO bGfhf Ohdjs; (3GdbGfhf GdOhdj GdYGes