Observadores

• 

  Laurie Cawthorne

  https://yiilu.net/%EC%95%88%EC%A0%84%ED%95%98%EA%B2%8C-%EC%A6%90%EA%B8%B0%EB%8A%94-%EC%8A%A4%ED%8F%AC%EC%B8%A0%ED%86%A0%ED%86%A0-%EC%9D%B8%EC%96%B4%EB%B2%A0%EA%B0%80%EC%8A%A4-%EB%A8%B9%ED%8A%80%EA%B2%80%EC%A6%9D/