(3GdCSdhH GdQheGfj aj GdCOH h Gdaf h GdMjGI (B/ s - (3gGedJhf, COjKs; (3YHhO, MfGs ((3OeTb (B:s (3hRGQI GdKbGaI,s, 1997)
Keywords: (3GdCOH GdQheGfjs; (3GdfbO GdCOHjs