(3YbO GdbQV aj GdTQjYI GdESdGejI (B:s (3YQV efgLj ebGQf (B/s - (3MeGO, fRjg ceGds ((3OeTb ;s (3GdchjJ (B:s (3OGQ Gdbde,s, 1991)
(3HHdjhLQGajI (B: (3U(B. 77-82.s
Keywords: (3GdbQhV (B((3abg ESdGej(B)s; (3GdESdGe hGdbQVs; (3GdVeGfGJ (B((3abg ESdGej(B)s; (3GdeYGedGJ (B((3abg ESdGej(B)s