Shōwa 23-nen jigyōsho chingin chōsa kekka hōkoku = Report of the 1948 census of wages in private, governmental and local governmental establishment employing 30 or more in 6 major groups of industries
Shōwa 40-nen kokusei chōsa hōkoku. Dai 2-kan, 1% chūshutsu shūkei kekka = 1965 population census of Japan. Volume 2, one percent sample tabulation results