(3MhGQGJ ddJGQjN (B: s (3eY edhc hQDSGA GdOhd hGdMcheGJ ai eUQ hGdYGde (B/ s - (3GHQGgje fGaYs ((3GdbGgQI (B: s (3eQcR GdGgQGe ddJQLeI hGdfTQ , s, 1997)
Keywords: (3Gdedhc hGdMcGes; (3QDSGA GdLeghQjIs; (3GdMhGQ GdGOHis