Shussanryoku chōsa ni motozuku kekkon to shussei no chiiki bunseki = Regional analyses of marriage and fertility on the basis of the Japanese national fertility survey
Heisei 17-nen dai 13-kai shusshō dōkō kihon chōsa : kekkon to shussan ni kansuru zenkoku chōsa = report on the thirteenth Japanese national fertility survey in 2005