(3OQGSI ai chdhSi (B,(3W(B2 / s - (3efjS YHO GdfhQs ([S.N] : (3OGQ GdKbGaI GdeSjMjI , s, 1979)
Keywords: (3GdGfLjds; (3GdcJGH GdebOSs; (3GdeSjMs