(3GdeYdheGJjI HYO GdGfJQfJ (B: (3WQjb GdeSJbHd(B((3YGde GdeYQaI(B231) / s - (3YHOGdSdGe QVhGfs; (3LjJS, Hjds ((3GdchjJ (B: s (3GdeLdS GdhWfi ddKbGaI hGdafhf hGdGOGH , s, 1998)
Keywords: (3GdMGSHGJ GdGdcJQhfjI (B- (3HQGeLs; (3GdEfJQfJ (B- (3JUeje ehGbYs