(3GdCfXeI GdSjGSjI GdeYGUQI (B/ s - (3jMji GdLeds ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI,s, 1990)
(3jTJed Ydi GQLGYGJ HHdjhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdfXe GdSjGSjIs