(3ehQahdhLjG h JTQjM GdfHGJ (B/ s - (3GdYQhSj, MSjfs; (3hUaj, YeGO GdOjfs ((3GdGScfOQjI (B:s (3OGQ GdeWHhYGJ GdLOjOI,s, 1991)
Keywords: (3Yde GdfHGJs; (3GdJTQjMs