Наблюдаващи

• 

  Stanley Rosson

  https://docdoce.com/%EB%B0%94%EC%B9%B4%EB%9D%BC%EC%82%AC%EC%9D%B4%ED%8A%B8-%ED%8C%81-%EC%8A%B9%EB%A6%AC%EC%9D%98-%EC%A0%84%EB%9E%B5%EA%B3%BC-%EC%8B%A4%EC%A0%84-%EB%A7%88%EC%8A%A4%ED%84%B0%ED%95%98%EA%B8%B0/