(3GdGHOGY GdYGe hGdNGU (B/s - (3QhTcG , GdcfOQh s; (3GHh aNQ, ZSGf YHO GdMj,s ((3GdchjJ(B:s (3GdeLdS GdhWfj ddKbGaI hGdafhf hGdGOGH,s, 1989)
Keywords: (3GdGHOGY (B.s