(3GdJbhje h GdbjGS GdfaSj h GdJQHhj (B/ s - (3GdZQjH, QeRjIs ((3GdbGgQI (B:s (3ecJHI GdCfLdh GdeUQjI,s, 1981)
Keywords: (3GdEeJMGfGJ h GdENJHGQGJ GdfaSjIs; (3GdJbhjes