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Publicado en línea: 08 may 2018
Páginas: 80 - 84
Recibido: 31 ene 2017
Aceptado: 29 oct 2017
DOI: https://doi.org/10.2478/prolas-2018-0013
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© 2018 Māra Kūka et al., published by De Gruyter Open
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Kūka, Māra
Latvia University of Life Sciences and TechnologiesJelgava, Latvia
Čakste, Ilze
Latvia University of Life Sciences and TechnologiesJelgava, Latvia
Kūka, Pēteris
Latvia University of Life Sciences and TechnologiesJelgava, Latvia