Heisei 2-nen kokusei chōsa hōkoku. Dai 3-kan : dai 2-ji kihon shūkei kekka = 1990 population census of Japan. Volume 3 : results of the second basic complete tabulation
Heisei 2-nen kokusei chōsa hōkoku. Dai 6-kan, Jūgyōchi tsūgakuchi shūkei kekka = 1990 population census of Japan. Volume 6, Results of tabulation on place of work or schooling