Ãâó : http://repository.krei.re.kr/bitstream/2018.oak/22696/1/%ed%97%a4%eb%8f%84%eb%8b%89%ea%b0%80%ea%b2%a9%eb%aa%a8%ed%98%95%ec%9d%84%20%ec%9d%b4%ec%9a%a9%ed%95%9c%20%ec%b9%98%ec%a6%88%ed%8a%b9%ec%84%b1%ec%9d%98%20%ec%86%8c%eb%b9%84%ec%9e%90%ec%a7%80%eb%b6%88%ec%9d%98%ec%82%ac%20%eb%b6%84%ec%84%9d.pdf