@techreport{KOSIS1980,
author = {KOSIS},
title= {Population by administrative district/sex/education level 1980},
year = {1980},
URL = {https://kosis.kr/statHtml/statHtml.do?orgId=101&tblId=DT_1IN8002&conn_path=I2},
publisher = {Statistics Korea},
address = {Daejeon},
}