Observerare

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  Alton Conklin

  https://glemm.us/%ED%86%A0%ED%86%A0%EC%82%AC%EC%9D%B4%ED%8A%B8-%EC%BB%A4%EB%AE%A4%EB%8B%88%ED%8B%B0-%EC%95%88%EC%A0%84%ED%95%98%EA%B3%A0-%ED%9A%A8%EA%B3%BC%EC%A0%81%EC%9D%B8-%EB%8F%84%EB%B0%95%EC%9D%98-%EC%83%88/