Posted on 28/06/2018 by Wiesław Pilch28.06.2018 Blockchain: Jak działa technologia blockchain cz2 https://od.lk/d/ODRfMTc4NTg1MTdf/28.06.2018%20Blockchain%20Jak%20dzia%C5%82a%20technologia%20blockchain%20cz2.mp3