(3OQH GdSdGe GdUYH (B/ s - (3cjSfLQ , gfQjs; (3ebdO , Ydj s ((3HjQhJ (B: s (3GdOGQ GdYGdejI ddWHGYI hGdfTQ hGdJhRjY , s, 1981)
Keywords: (3GhQHG (B- (3JGQjN (B- (3GdbQf GdYTQhf s