Kilka godzin wykładów Grzegorza Brauna dla Polonii w mieście Chicago
https://www.youtube.com/watch?v=WsJD2xJt37s
https://www.youtube.com/watch?v=Ex4LRywWENs
https://www.youtube.com/watch?v=AzrkQown4BI
https://www.youtube.com/watch?v=lZIv9nULenY
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