(3HgLI GdfGXQjf ajeG jUdM GdOfjG hGdOjf (B/s - (3LGQ Gddg, YHO Gddg Hf LGQ Gddg Hf EHQGgje s ((3LOI(B:s (3ecJHI GdShGOj ddJhRjY,s, 1990)
Keywords: (3GdhYX hGdEQTGOs