(3eLJeY bhj GdHfjGf (B/ s - (3HQGhf, dSJQ Qs; (3JcdG, ejTjds ((3GdbGgQI (B:s (3eDSSI OGQ GdJYGhf ddWHY h GdfTQ,s, 1987)
Keywords: (3GdeLJeYs; (3Yde GdELJeGYs