(3GdSGdchf Edi Gddg GdQGZHhf aj GdLfI (B/s (3XGde dfaSg (B- (3ebJUO(B-(3SGHb HGdNjQGJs - (3gdGd, eMehO Hf eMeO(B.s ((3GdchjJ (B:s (3ecJHI OGQ GdHjGf,s, 1990)
Keywords: (3GdKhGH hGdYbGHs; (3GdMSfGJ hGdSjFGJs; (3GdLfIs