On the quantity and quality of knowledge : The impact of openness a. foreign research a. development on North-North a. North-South technology spillovers / Maurice Schiff a. Yanling Wang. - Washington : World Bank, 2004. - 21 p. ; 27 cm.см.. - (Policy research working paper ; 3190). - ბიბლიოგრ.: გვ. 18-19[MFN: 4337]