(3MjGRI GdbOQI GdJcfhdhLjI(B: (3OQGSI Yf GdeDSSGJ GdGSJTGQjI heDSSGJ GdebGhdGJ (B/ s - (3GfWhGf RMdGfs; (3eQcR OQGSGJ GdhMOI GdYQHjIs ([S.N] : (3eQcR OQGSGJ GdhMOI GdYQHjI , s, 1990)
Keywords: (3GdYGde GdYQHis; (3GdeDSSGJ GdYGeIs; (3GdJcfhdhLjG hGdOhdIs