Retherford, R. D. (2004). Trends in fertility by education in Japan, 1966-2000. Tokyo, Japan Honolulu, Hawaii, U.S.A. Tokyo, Japan: Nihon University Population Research Institute ;: East-West Center ;: Statistics Bureau, Statistical Research and Training Institute, Ministry of Public Management, Home Affairs, Posts and Telecommunications ;.

Retherford, Robert D. Trends in Fertility By Education in Japan, 1966-2000. Tokyo, Japan Honolulu, Hawaii, U.S.A. Tokyo, Japan: Nihon University Population Research Institute ;: East-West Center ;: Statistics Bureau, Statistical Research and Training Institute, Ministry of Public Management, Home Affairs, Posts and Telecommunications ;, 2004.

Retherford, Robert D. Trends in Fertility By Education in Japan, 1966-2000. Tokyo, Japan Honolulu, Hawaii, U.S.A. Tokyo, Japan: Nihon University Population Research Institute ;: East-West Center ;: Statistics Bureau, Statistical Research and Training Institute, Ministry of Public Management, Home Affairs, Posts and Telecommunications ;, 2004.