(3GddZI GdEYdGejI (B/s - (3TQa, YHO GdYRjRs ((3HjQhJ (B:s (3OGQ GdLjd,s, 1991)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3hSGFd GdEYdGes; (3GddZI GdYQHjIs