TY  - CHAP
A1  - Cai, Y.
A1  - Lavely, W.
T1  - Child sex ratios and their regional variation
Y1  - 2007
DO  - 10.1093/acprof:oso/9780199299294.003.0007
A3  - Zhao, Z.
A3  - Fei, G.
T2  - Transition and challenge: China’s population at the beginning of the 21st century
CY  - New York
PB  - Oxford University Press

ER  -