(3aJhM GdHdOGf (B/ s - (3GdHdGPQi (B: (3GHi GdMSjfs; (3QVhGf eMeO QVhGfs ((3HjQhJ (B: s (3OGQ GdcJH GdYdejI ddfTQ hGdJhRjY , s, 1991)
Keywords: (3GdaJhMGJ GdGSdGejIs; (3GdJGQjN GdGSdGeis