(3GdbVGA GdOSJhQj GdeUQj (B/ s - (3YRjRI GdTQjas ((3GdbGgQI (B: s (3OGQ GdfgVI GdYQHjI, s, 1990)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdSdWI GdbVGFjIs; (3GdbGfhf GdOSJhQis