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Journal of the Bulgarian Geographical Society 44: 7-14
doi: 10.3897/jbgs.e64223
Received: 09 Feb 2021 | Approved: 28 Apr 2021 | Published: 04 Jun 2021
This article is part of:
Journal of the Bulgarian Geographical Society 44
Author
   
Stanley D Brunn - Corresponding author
University of Kentucky, Lexington, United States of America
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Academic editor
Stoyan Nedkov
National Institute of Geophysics, Geodesy and Geography - Bulgarian Academy of Sciences, Sofia, Bulgaria
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Conflict of interest
The author has declared that no competing interests exist.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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