On-line knowledge sharing - G3BJ

On-line knowledge sharing - G3BJ https://www.iaru-r1.org/2020/on-line-knowledge-sharing/ https://translate.google.com/translate?hl=&sl=en&tl=pl&u=https%3A%2F%2Fwww.iaru-r1.org%2F2020%2Fon-line-knowledge-sharing%2F&sandbox=1

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