TY  - BOOK
AU  - Smith David
AU  - Keyfitz Nathan
TI  - Mathematical demography: selected papers
SN  - 0-3870-789-91
U1  - 304.60151 
PY  - 1977///
CY  - Berlin
PB  - Springer-Verlag
KW  - Demography
KW  - Mathematical models
ER  -