http://db.history.go.kr/item/level.do?levelId=npda_1929_01_30_v0004_0500
https://nl.go.kr/newspaper/detail.do?content_id=CNTS-00094431815&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_10_05_v0004_0780
https://www.nl.go.kr/newspaper/detail.do?content_id=CNTS-00094431815&from=%EC%8B%A0%EB%AC%B8%20%EA%B2%80%EC%83%89
https://www.nl.go.kr/newspaper/detail.do?content_id=CNTS-00094146806&from=%EC%8B%A0%EB%AC%B8%20%EA%B2%80%EC%83%89