(3OhQ GdGSJKeGQ GdNGU ai JMbjb CgOGa NWW GdJfejI (B/s - (3HMhK hefGbTGJ GdeDJeQ GdYdei GdKGdK YTQ ddGbJUGOjjf GdeUQjjfs ((3GdbGgQI (B:s 1988) ((3GdbGgQI (B:s (3GdLeYjI GdeUQjI ddGbJUGO GdSjGSi hGdGMUGA hGdJTQjY,s, 1989)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdGSJKeGQs; (3GdeGdjI GdYGeI hGdJTQjY GdVQjHjs