Bidliography：
United Nations, World Population Prospects： The 1996 Revision, October 1996
Keiko Wakabayashi, "The population problem in China", Tokyo University Press, 1989
Yasuko Hayase, "Population Fluctuation in China", Asian Economic Research Center, 1992
Aging Total Research Center, "Study Reports on 'Aging Population and Living Conditions of the Old Age in China, Korea and Taiwan'", March 1995
Chinese Population The Population Study Association of China "Collected Papers of the Forum on Chinese Population", (23rd IUSSP), October 1997
