RACZYK, Andrzej and DOBROWOLSKA-KANIEWSKA, Helena. Spatial distribution of economic entities and their classification according to technology levels in the Dolnośląskie voivodship. Bulletin of Geography. Socio-economic Series. Online. 1 June 2007. No. 7, pp. 15-29. [Accessed 8 July 2024]. DOI 10.1515/2441.