(3GdXGgQI hGdEHYGO (B/ s - (3GdYjWGfjI, CjGJ SdeGf QTOjs ((3YeGf (B:s (3OGQ GddhGA ddUMGaI hGdfTQ,s, 1989)
Keywords: (3GdSjQI GdfHhjIs; (3GdESdGes; (3OaY GdeWGYfs