Ãâó : http://www.cerik.re.kr/file/download/report/1240/?filename=%EA%B5%AD%EC%A0%9C%ED%9A%8C%EA%B3%84%EA%B8%B0%EC%A4%80%20%EB%8F%84%EC%9E%85%20%EA%B4%80%EB%A0%A8%20%EA%B1%B4%EC%84%A4%EB%B6%84%EC%95%BC%20%EC%A3%BC%EC%9A%94%20%EC%9D%B4%EC%8A%88%20%EB%B0%8F%20%EB%8C%80%EC%9D%91%EB%B0%A9%EC%95%88.pdf