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Publicado en línea: 01 jul 2017
Páginas: 153 - 160
Recibido: 27 sept 2011
DOI: https://doi.org/10.1515/sg-2013-0020
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© 2017
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Tsarev, Anatoly P.
Dr. Agricultural Sc., Professor of Forest Engineering Faculty, Forestry Chair, Petrozavodsk State University, 33 Lenin pr., Petrozavodsk, 185910,Karelia, Russian Federation