(3JaSjQ GMdGe GdJTGDe (B/ s - (3GHf SjQjf (B: (3GHh HcQ eMeO Hf SjQjf GdHUQi GdGfUGQis; (3YHOGdMajX HjVhfs ((3HjQhJ (B: s (3OGQ GdcJH GdYdejI ddfTQ hGdJhRjY , s, 1990)
Keywords: (3GdGMdGes; (3JaGSjQs; (3GdGMdGe (B- (3JaSjQs