TY  - BOOK
A1  - Shryock, H.S.
A1  - Siegel, J.S.
T1  - The Methods and Materials of Demography
Y1  - 1976
DO  - 10.1016/B978-0-12-641150-8.50022-6
CY  - London
PB  - Academic Press INC

ER  -