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References

29 四月, 2015 - 15:03
  1. Sullivan, arthur; Steven M. Sheffrin (2003). Economics: k. Upper Saddle River, New Jersey 07458: Pearson Prentice Hall. pp. 511. ISBN 0-13-063085-3.
  2. de Albuquerque, Martim (1855). Notes and Queries. London: George Bell. pp. 431.
  3. Matyszak, Philip (2007). Ancient Rome on Five Denarii a Day. New York: Thames & Hudson. pp. 144. ISBN 0-500-05147-X.