1. Tackling the challenges to health equity in China;Tang;Lancet,2008
2. World population prospects: the 2006 revision,2006
3. 1982 population census of China,1985
4. Tabulation on the 1990 population census of the People's Republic of China,1993
5. State Statistical Bureau. Tabulation on the 2000 population census of the People's Republic of China,2002