(3GdfaS hGdbGfhf (B: s (3OQGSI aj GdWH GdfaSj GdYOdj (B/ s - (3GHQGgje , QjcGf s ((3HZOGO (B: s (3eQcR GdHMhK GdbGfhfjI , s, 1988)
Keywords: (3GdbGfhf GdLfGFj s