^Garland, G., Peru in the 21st Century : Challenges and Possibilities in Futures: the Journal of Forecasting, Planning and Policy, May 1990, Volume 22, Nº 4, Butterworth-Heinemann, London, England ; and Perú Siglo XXI, series of 11 working papers describing sectorial long-term forecasts, Grade, Lima, Peru, 1986–1987.
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