(3GHhGdaQL GHf GdLhRi (B510 (3g` (B- 597 (3g` GQGAhg GdcdGejg hGdGNdGbjg (B/ s - (3Gefg eMeO fUjQs ([S.N] : (3OGQ GdTQhb , s, 1987)
Keywords: (3GdadSaI GdGSdGejIs; (3GHhGdaQL Hf GdLhRis