Observadores

• 

  Lawerence Glasheen

  https://qiyuese.com/2024/11/11/%EC%8B%A0%EB%A2%B0%ED%95%A0-%EC%88%98-%EC%9E%88%EB%8A%94-%EC%B9%B4%EC%A7%80%EB%85%B8%EC%82%AC%EC%9D%B4%ED%8A%B8-%EC%84%A0%ED%83%9D%ED%95%98%EA%B8%B0-%ED%86%A0%ED%86%A0%EC%82%AC%EC%9D%B4%ED%8A%B8/