(3GdCSS GdadSajI ddajRjGA (B: s (3eONd Edi adSaI GdYdhe (B/ s - (3cGQfGH, QhOdas; (3faGOi, GdSjOs ((3GdbGgQI (B:s (3OGQ GdKbGaI GdLOjOI,s, 1990)
Keywords: (3GdajRjGAs; (3GdadSaIs; (3GdfXQjGJs