(3GdbGfhf GdEOGQj GdchjJj (B:s (3hbGfhf GdNOeI GdeOfjI GdLOjO (B/s - (3eGLO QGZH GdMdhs ((3GdSGdejI (B:s (3PGJ GdSdGSd,s, 1980)
(3GdfU CZdHg HGddZI GdYQHjI eY HYV GdfUhU GdaQfSjIs
Keywords: (3GdbGfhf GdEOGQjs