Dai 4-kai setai dōtai chōsa (1999-nen shakai hoshō jinkō mondai kihon chōsa) : gendai Nihon no setai hendō
Author
[henshū Kokuritsu Shakai Hoshō Jinkō Mondai Kenkyūjo] = The fourth national survey on household changes, 1999 / National Institute of Population and Social Security Research