(3GhQGb GdQHjY ai GdecJHGJ hGdeYdheGJ (B/ s - (3TYHGf YHOGdYRjR NdjaIs ((3GdbGgQI (B: s (3GdYQHi ddfTQ hGdJhRjY , s, 1989)
Keywords: (3Yde GdeYdheGJs; (3Yde GdecJHGJs; (3GOH GdecJHGJs