(3GdeJNjd GdSQOi (B: (3ebGQHGJ fbOjI ai GdJfGU hGdQDi hGdOdGdI (B/ s - (3YHOGddg GHQGgjes ([S.N] : (3GdeQcR GdKbGai GdYQHi , s, 1990)
Keywords: (3GdGOH GdYQHis; (3GddZI GdYQHjIs; (3GdHdGZI GdYQHjIs; (3OdGdI Gdeaghes; (3OdGdI GdefWhbs