Observadores

• 

  Mildred Steinke

  https://hint.blog/%EB%A9%94%EC%9D%B4%EC%A0%80%EC%82%AC%EC%9D%B4%ED%8A%B8%EC%9D%98-%EC%A4%91%EC%9A%94%EC%84%B1%EA%B3%BC-%EA%B7%B8-%ED%99%9C%EC%9A%A9-%EB%B0%A9%EB%B2%95/