Observadores

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  Byron Gowins

  https://coinfindex.com/%ec%a0%84%eb%b6%81%ec%97%90%ec%84%9c-%eb%a7%8c%eb%82%98%eb%8a%94-%eb%b0%a4%ec%9d%98-%eb%a7%a4%eb%a0%a5-%ec%a0%84%eb%b6%81%eb%b0%a4%ec%95%8c%eb%b0%94%ec%9d%98-%ea%b8%b0%ed%9a%8c/