Heisei 2-nen kokusei chōsa hōkoku. Dai 4-kan, Dai 3-ji kihon shūkei kekka = 1990 population census of Japan. Volume 4, Results of the second basic complete tabulation
Guo jia tong ji ju ren kou he jiu ye tong ji si bian = China population and employment statistics yearbook / compiled by Department of Population and Employment Statistics, National Bureau of Statistics of China