New York : National Bureau of Economic Research; distributed by Columbia University Press, 1970 , "A conference of the Universities-National Bureau Committee for Economic Research." 0870142089
Place Hold on The Technology factor in international trade /
]]>Cambridge: Cambridge University Press, 1975 . xvii, 539 p. ; 24 cm. 0521022045
]]>Washington, DC : World Bank, . xvi, 466 p. : 9780821377079
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