STEPHAN, A. (1997): "The Impact of Road Infrastructure on Productivity and Growth: Some Preliminary Results for the German Manufacturing Sector," Discussion Paper FS IV 97-47, Wissenschaftszentrum Berlin.
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Stephan, A. (1997), The impact of road infrastructure on productivity and growth: Some preliminary results for the german manufacturing sector, Technical Report FS IV 97-47, Wissenschaftszentrum Berlin.
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STEPHAN, A. (1997). The Impact of Road Infrastructure on Productivity and Growth: Some Preliminary Results for the German Manufacturing Sector. Wissenschaftszentrum Berlin: Discussion Paper FS.
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