(3GdOaGY GdGLJeGYi GdLOjO (B: (3SjGSI LfGFjI GfSGfjI (B/ s - (3MSf YdGes; (3eGQc (B,(3GfSds ([S.N] : (3efTGI GdeYGQa GdGSdGejI , s, 1991)
Keywords: (3GdLQjeI hGdeLQehfs; (3GdSQbIs; (3GdGUdGMjGJs; (3GdOaGY GdGLJeGYis