DOI: https://doi.org/10.1515/mgrsd-2017-0015 | Journal eISSN: 2084-6118 | Journal ISSN: 0867-6046 (formerly 2084-6118)
Language: English
Page range: 68 - 72
Submitted on: Feb 24, 2017
Accepted on: May 22, 2017
Published on: Jun 30, 2017
Published by: Faculty of Geography and Regional Studies, University of Warsaw
In partnership with: Paradigm Publishing Services
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© 2017 Jacek Szlachta, published by Faculty of Geography and Regional Studies, University of Warsaw
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.