TY  - BOOK
AU  - Birdsall Nancy
TI  - Population and poverty in the developing world, 1980
T2  - World Bank Staff Working paper,404
U1  - Y:50r434.1(X).N7, M0/UN 
PY  - 1980///
CY  - Washington
PB  - D C World Bank USA      
N1  - Bibliography : P89-96
ER  -