Heisei 2-nen kokusei chōsa hōkoku. Bekkan. Waga kuni ni jinkō shūchū chiku = 1990 population census of Japan special volume. Densely inhabited districts
Shōwa 45-nen kokusei chōsa hōkoku. Bekkan [2], Kokusei tōkeiku kyōkaizu = 1970 population census of Japan. Special volume [2], Atlas of census tract boundaries