kornel_munthe@yahoo.com
peransimanihuruk09@gmail.com
csintinjak@gmail.com
jozef.ober@polsl.pl
anna.kochmanska@polsl.pl
© 2024 Kornel Munthe, Peran Simanihuruk, Charli Sitinjak, Józef Ober, Anna Kochmańska, published by STE Group sp. z.o.o.This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.