Observadores

• 

  Ermelinda Polson

  https://volvi.us/%EC%86%8C%EC%95%A1%EB%8C%80%EC%B6%9C%EC%9D%B4-%ED%95%84%EC%9A%94%ED%95%9C-%EC%9D%B4%EC%9C%A0%EC%99%80-%EC%9D%B4%EC%A7%80%EB%A1%A0%EC%9D%98-%EB%A7%A4%EB%A0%A5/