(3HMhK h efGbTGJ GdfOhI GdacQjI (B/ s - (3Ghedjd, Ydjs; (3fOhI GdJfejI GdHTQjI aj GdhWf GdYQHj (B((3YeGf (B:1993)s
Keywords: (3GdJfejI h GdELJeGYjI h GdEbJUGOjIs; (3GdJehjds; (3GdHdOGf GdYQHjIs