(3GdYGde GdHjRfWi (B/ s - (3gSi, L(B. (3e(B.s; (3QGaJ YHOGdMejOs ((3GdbGgQI (B: s (3Yjf ddOQGSGJ hGdHMhK GdGfSGfjI hGdGLJeGYjI,s, 1997)
Keywords: (3GdjhfGfs; (3GdjhfGf GdbOjeI (B- (3JGQjNs; (3GdjhfGf (B- (3JGQjNs; (3GdjhfGf (B- (3JGQjN (B-(3GdYUQ GdQheGfs