© Stefan Petrov, Ivan Drenovski. 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. Citation:
Petrov S, Drenovski I (2020) Air quality management in Vidin. Journal of the Bulgarian Geographical Society 43: 69-73. https://doi.org/10.3897/jbgs.2020.43.11 |