(3eSjQI GdTYH GdadSWjfi hGaGb GdUQGY GdYQHi (B-(3GdGSQGFjdi ai GdKeGfjfGJ (B,(3W (B2 / s - (3GMeO UObi GdOLGfis ([S.N] : (3eDSSI GdOQGSGJ GdadSWjfjI , s, 1986)
Keywords: (3GdfRGY GdYQHi GdGSQGFjdis; (3adSWjfs; (3GdadSWjfjhfs