Pubblicato online: 22 dic 2018
Pagine: 99 - 104
DOI: https://doi.org/10.2478/mgrsd-1992-050115
© 2018 Jerzy Boryczka, et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Jerzy Boryczka
Małgorzata Gutry-Korycka
Katarzyna Łopata