TY  - CHAP
A1  - Estee, S.
T1  - Natality – Measures based on vital statistics
Y1  - 2004
A3  - Siegel, J.
A3  - Swanson, D.
T2  - The methods and materials of demography. 2nd edition
CY  - Amsterdam
PB  - Elsevier

ER  -