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Geographical context of energy prices in the European Union Member States with special emphasis on the Slovak republic
Martin Mačanga, Martin Plešivčák
Bulletin of Geography. Socio-Economic Series /24 (2014) s. 135-159 -
Population of American cities : 1950-2009
Witold J. Wilczyński, Piotr L. Wilczyński
Bulletin of Geography. Socio-Economic Series /16 (2011) s. 153-172