(3gPg gj GdUhajI (B/s - (3Gdhcjd, YHO GdQMefs ((3HjQhJ (B:s (3OGQ GdcJH GdYdejI,s, 1984)
(3HHdjhLQGajI (B: (3U(B. 183-185.s
Keywords: (3GdJUha GdESdGejs