(3GdebGd h afhfg YfO GdTjN Ydj jhSa (B/ s - (3YHO GddWja, WGgQs ((3GdbGgQI (B:s (3ecJHI GdcdjGJ GdCRgQjI,s, 1989)
Keywords: (3GdJQGLes; (3GdCOHGA GdYQHs