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1دورية
المصدر: National Review; 3/16/1992, Vol. 44 Issue 5, p16-16, 1/4p
مصطلحات موضوعية: MIDDLE class, INCOME, SOCIAL classes, DEMOGRAPHIC surveys, HOUSEHOLD surveys, CENSUS, INCOME inequality, DISTRIBUTION (Economic theory)
مصطلحات جغرافية: UNITED States