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	1.		(United Nations) international comparison project. Phase II. International comparisons of real product and purchasing power produced by the Statistical Office of the United Nations and the World Bank by Kravis, Irving B Heston, Alan Summers, Robert Statistical Office. United Nations, UN Statistical Office. World Bank Language: English Publication details: Baltimore Johns Hopkins University Press 1978 Availability: Items available for loan: SIPRI Library and Documentation (1)Call number: 31 United Nations. Place hold Add to cart (remove)
	2.		(United Nations) international comparison project. Phase III. World product and income : international comparisons of real gross product produced by the Statistical Office of the United Nations and the World Bank by Kravis, Irving B Heston, Alan Summers, Robert Statistical Office. United Nations, UN Statistical Office. World Bank Language: English Publication details: Baltimore Johns Hopkins University Press 1982 Availability: Items available for loan: SIPRI Library and Documentation (1)Call number: 31 United Nations. Place hold Add to cart (remove)
	3.		(United Nations) international comparison project. Phase I. A system of international comparisons of gross product and purchasing power produced by the Statistical Office of the United Nations and the World Bank, and the International Comparison Unit of the University of Pennsylvania by Kravis, Irving B Kenessy, Zoltan Heston, Alan Summers, Robert Statistical Office. United Nations, UN Statistical Office. World Bank International Comparison Unit. University of Pennsylvania Language: English Publication details: Baltimore Johns Hopkins University Press 1975 Availability: Items available for loan: SIPRI Library and Documentation (1)Call number: 31 United Nations. Place hold Add to cart (remove)
	4.		International price and quantity comparisons potentials and pitfalls by Heston, Alan Summers, Robert Language: English In: American economic review 1996(86):2 , p. 20-24 Availability: Items available for loan: SIPRI Library and Documentation (1)Call number: 'Separate journal articles' box. Place hold Add to cart (remove)