Observerare

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  Carl Lahr

  https://lvivacc.site/course/%d0%b1%d0%b0%d0%bd%d0%ba-%d1%82%d0%b5%d1%81%d1%82%d1%96%d0%b2-%d0%bf%d0%b8%d1%82%d0%b0%d0%bd%d1%8c/