(3MOGFb GdGfhGQ heWGdY GdGSQGQ aj SjQI GdfHj GdeNJGQ(B((3U(B)s - (3eMeO Hf YeQ HMQb GdMVQej GdTGaYjs ((3OeTbs (3eWHYI eMeO gGTe GdcJHjs, 1998)
Keywords: (3GdSjQI hGdbQGfs