(3GdCMQa GdSHYI h efRdI GdbQAGJ efgG (B/ s - (3YJQ, MSf VjGA GdOjfs ((3HjQhJ (B:s (3OGQ GdHTGFQ GdESdGejI,s, 1988)
Keywords: (3GdbQBf GdcQjes; (3GdbQGAGJ GdbQBfjI GdSHYs; (3GdYdhe GdbQBfjIs