(3fXe JTZjd GdMGSH GdTNUi GdOhS (B((3GdfU HGdYQHjI hGdGfLdjRjI(B) / s - (3eMeO GdSYjO NTHIs ([S.N] : (3dLfI GdGYdGe hGdOQGSGJ GdeSJbHdjI , s, 1991)
Keywords: (3GdMGSHGJ GdGdcJQhfjIs; (3OhSs; (3HQGeL GdMGSHGJ GdGdcJQhfjIs