(3GdEQgGH GdSjGSi hGdbGfhf GdLfGFi (B/s - (3YHOGdQMje UObis ((3GdbGgQI (B:s (3OGQ GdKbGaI GdYQHjI,s, 1985)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdJTQjY GdNGU HGdEQgGHs; (3GdbGfhf GdLfGFjs