(3eYLe GdeUWdMGJ h GdCdaGX GdCLfHjI aj GddZI GdYGejI GdYQGbjI (B/ s - (3eMeO, eLjOs ((3HZOGO (B:s (3OGQ GdTDhf GdKbGajI,s, 1990)
Keywords: (3GddgLGJ GdYGejIs; (3Yde GdeUWdMGJs; (3GddZI GdYQHjIs; (3GdYQGbs