https://nl.go.kr/newspaper/detail.do?content_id=CNTS-00094683608&from=%EC%8B%A0%EB%AC%B8%20%EA%B2%80%EC%83%89
https://nl.go.kr/newspaper/detail.do?content_id=CNTS-00094656155&from=%EC%8B%A0%EB%AC%B8%20%EA%B2%80%EC%83%89
https://nl.go.kr/newspaper/detail.do?content_id=CNTS-00094423462&from=%EC%8B%A0%EB%AC%B8%20%EA%B2%80%EC%83%89
http://db.history.go.kr/item/level.do?levelId=npda_1926_03_01_v0004_0870