Observadores

• 

  Martin Tier

  https://8012.kr/%EC%97%AC%EC%84%B1%EA%B3%A0%EC%86%8C%EB%93%9D%EC%95%8C%EB%B0%94-%EC%83%88%EB%A1%9C%EC%9A%B4-%EC%9D%BC%EC%9E%90%EB%A6%AC%EB%A5%BC-%EC%B0%BE%EC%95%84%EC%84%9C/