https://nl.go.kr/newspaper/detail.do?content_id=CNTS-00093845871&from=%EC%8B%A0%EB%AC%B8%20%EA%B2%80%EC%83%89
http://db.history.go.kr/item/level.do?levelId=npda_1925_11_21_v0004_0960
http://db.history.go.kr/item/level.do?levelId=npda_1930_11_02_v0001_0070
https://www.nl.go.kr/newspaper/detail.do?content_id=CNTS-00093793693&from=%EC%8B%A0%EB%AC%B8%20%EA%B2%80%EC%83%89