(3eLJeY GdbQjI (B: s (3OQGSGJ h HMhK (B/ s - (3CMeO, ZQjH eMeO SjOs; (3YHO GdeYWj, YHO GdHGSW eMeOs ((3GdGScfOQjg (B:s (3OGQ GdeYQaI GdLGeYjI,s, 1987)
Keywords: (3Yde GdELJeGY GdQjajs