(3GdefJXe aj JGQjN Gdedhc hGdGee (B/s - (3GHf GdLhRj ,GHj GdaQL YHO GdQMef Hf Ydj GHf eMeO s ((3HZOGO (B[ (3GdYQGb (B] :s (3OGQ GdhWfjI,s, 1990)
Keywords: (3Gdedhc (B- (3JQGLes