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Lua i Stíl Chicago (17ú heag.)International Symposium on Technological Change and Employment: Urban and Regional Dimensions Zandvoort, Netherlands, agus P. Nijkamp. Technological Change, Employment, and Spatial Dynamics: Proceedings of an International Symposium on Technological Change and Employment: Urban and Regional Dimensions, Held at Zandvoort, the Netherlands, April 1-3, 1985. Berlin ; New York: Springer-Verlag, 1986.
Lua MLA (8ú heag.)International Symposium on Technological Change and Employment: Urban and Regional Dimensions Zandvoort, Netherlands, agus P. Nijkamp. Technological Change, Employment, and Spatial Dynamics: Proceedings of an International Symposium on Technological Change and Employment: Urban and Regional Dimensions, Held at Zandvoort, the Netherlands, April 1-3, 1985. Springer-Verlag, 1986.