TY  - BOOK
AU  -  Smith T.Lynn, Zopf Paul E.
TI  - Demography: principles and methods
SN  - 0803679203
U1  - 301.32 
PY  - 1970///
CY  - Philadelphia
PB  - F.A.Davis
KW  - Population
KW  - Demography
N2  -  Demography, Population
ER  -