(3LQjeI GUOGQ Tjc HdG QUjO (B: s (3OQGSI JMdjdjI aj GdbGfhf GdGQOfj (B/ s - (3GdRYHj, eadM eMeO TJjhj, s ((3YeGf (B[(3GdGQOf(B] : s (3TQcI ZQGHdj ddWHGYI (B989.s, 1989)
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B122-124.s
Keywords: (3GdTjcGJs -- (3GdGQOf(B.s