(3fXQjGJ aj CSGdjH GdEbfGY (B:s (3OQGSI ebGQfI (B/s - (3QRb, Ydjs ((3HjQhJ (B:s (3OGQ GdUahI,s, 1994)
(3HHdjhLQGajI (B: (3U(B. 185-191.s
Keywords: (3GdEbfGYs; (3GdVHW GdGLJeGYjs