Observadores

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  Juliana Eggers

  https://ruuby.us/%EC%95%88%EC%A0%84%ED%95%9C-%ED%86%A0%ED%86%A0%EC%82%AC%EC%9D%B4%ED%8A%B8-%EC%84%A0%ED%83%9D%EC%9D%84-%EC%9C%84%ED%95%9C-%EA%B0%80%EC%9D%B4%EB%93%9C/