Ãâó : http://www.koti.re.kr/upload/research_report/%EC%97%B0%EC%B4%9D_2007_05_%EC%A7%80%EB%B0%A9%EA%B5%90%ED%86%B5%EC%8B%9C%EC%84%A4%ED%88%AC%EC%9E%90%EA%B4%80%EB%A0%A8%EA%B5%AD%EA%B3%A0%EB%B3%B4%EC%A1%B0%EA%B8%88%EC%A7%80%EC%9B%90%EC%B2%B4%EA%B3%84%EA%B0%9C%ED%8E%B8%EB%B0%A9%EC%95%88_%EC%98%A4%EC%9E%AC%ED%95%99%EB%B0%95%EC%83%81%EC%9A%B0.pdf