(3GdRfG (B:s (3JMQjeg(B-(3CSHGHg hOhGaYg(B-(3fJGFLg hBKGQg (B/s - (3LHQ, OfOd(B.s ((3GdRQbGA, GdCQOf (B:s (3ecJHI GdefGQ,s, 1987)
Keywords: (3GdRfG (B((3abg ESdGej(B)s; (3LQGFe GdBOGH GdYGeIs; (3GdYbhHGJ (B((3abg ESdGej(B)s