(3GdYHK h GdEfJMGd aj GdTYQ GdYHGSj (B/ s - (3YHO Gddg, UdGM eUdMjs ((3GdGScfOQjI (B:s (3OGQ GdeYQaI GdLGeYjI,s, 1991)
Keywords: (3GdTYQ GdYQHjs; (3GdfbO GdCOHjs