(3GLQGAGJ GdJfaHP ai GdehGO GdeOfjI hGdJLGQjI (B/ s - (3GMeO GHhGdhaGs ([S.N] : (3efTGI GdeYGQa GdGSdGejI , s, 1991)
Keywords: (3GdbGfhfs; (3bGfhf GdeQGaYGJs