[No abstract available]
Copyright (c) 2020 Batkhishig Bayaraa
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright on any research article in the Mongolian Geoscientist is retained by the author(s).
The authors grant the Mongolian Geoscientist a license to publish the article and identify itself as the original publisher.
Articles in the Mongolian Geoscientist are Open Access articles published under a Creative Commons Attribution 4.0 International License CC BY.
This license permits use, distribution and reproduction in any medium, provided the original work is properly cited.