(3GdehGdj (B: (3ehba GdOhdI GdCehjI efge (B/ s - (3GdeUQj, Lejd YHO Gddg eMeOs ((3YeGf (B:s (3OGQ Ge GdbQi ddfTQ h GdJhRjY,s, 1988)
Keywords: (3GdJGQjN GdYQHj GdGSdGejs; (3GdYUQ GdGehjs