Observadores

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  Byron Gowins

  https://safeplayground.net/%ec%a0%9c%ec%a3%bc%eb%b0%a4%ec%95%8c%eb%b0%94-%ec%97%ac%ec%84%b1%ec%9d%84-%ec%9c%84%ed%95%9c-%ec%83%88%eb%a1%9c%ec%9a%b4-%ea%b8%b0%ed%9a%8c/