(3GSWhQI GdJchjf(B:(3GdKbGaI GdGSQGFjdjI GdedabI (B/ s - (3GfWhGf TdMJs ([S.N] : (3QjGV GdQjS ddcJH hGdfTQ , s, 1991)
Keywords: (3GSQGFjds; (3GdKbGaIs; (3GdUMGaIs