https://nl.go.kr/newspaper/detail.do?content_id=CNTS-00094482071&from=%EC%8B%A0%EB%AC%B8%20%EA%B2%80%EC%83%89
https://nl.go.kr/newspaper/detail.do?content_id=CNTS-00094419964&from=%EC%8B%A0%EB%AC%B8%20%EA%B2%80%EC%83%89
http://db.history.go.kr/item/level.do?levelId=npda_1932_10_07_v0004_1000
http://db.history.go.kr/item/level.do?levelId=npda_1922_03_29_v0004_0650