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¡¤ https://www.yna.co.kr/view/AKR20180316179200002
¡¤ https://www.donga.com/news/Society/article/all/20210310/105802401/1
¡¤ https://happyedu.moe.go.kr/happy/bbs/selectBoardArticleInfo.do?bbsId=BBSMSTR_000000000231&nttId=11342
¡¤ https://wspaper.org/article/27593
¡¤ https://repository.kihasa.re.kr/bitstream/201002/482/2/%EC%97%B0%EA%B5%AC-07-09.pdf
¡¤ https://www.futurekorea.co.kr/news/articleView.html?idxno=144501
¡¤ https://www.peoplepower21.org/welfarenow/%ec%9b%94%ea%b0%84%eb%b3%b5%ec%a7%80%eb%8f%99%ed%96%a52016/1456365
¡¤ https://www.donga.com/news/Society/article/all/20201013/103398896/1
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¡¤ https://m.post.naver.com/viewer/postView.naver?volumeNo=11622907&memberNo=32927668