Observadores

• 

  Valentin Hillier

  https://izlego.com/%EC%8B%A0%EC%9A%A9%EC%A0%90%EC%88%98-%EB%8C%80%EC%B6%9C%EC%9D%98-%EC%B2%AB%EA%B1%B8%EC%9D%8C%EA%B3%BC-%EC%9D%B4%EC%A7%80%EB%A1%A0-%EC%B6%94%EC%B2%9C/