(3YeQ CHh QjTI(B: (3TGYQ GdLeGd hGdbJGd W(B2s - (3GdMGhj(B. (3EjdjGs ((3OGQ GdcJGH GddHfGfjs (3HjQhJs, 1980)
Keywords: (3GdCOH GdYQHj (B- (3fbO s; (3GdfbO GdCOHj GdTYQ (B- (3fbO COHj s