(3SjchdhLjI GddZI hGdeQV GdYbdj (B/ s - (3jhSa , LeYI SjO s ((3GdchjJ (B: s (3GdeLdS GdhWfj ddKbGaI hGdafhf hGdGOH , s, 1990)
Keywords: (3Yde GdfaS GdJQHhj s