TY  - BOOK
AU  - Keyfitz,Nathan 
AU  - Beekman,John A.
TI  - Demography Through Problems
SN  - 3540908366
U1  - 304.6076 
PY  - 1984///
CY  - New York: 
PB  - Springer-Verlag, 
KW  - Forcasting
KW  - Population Model
KW  - Probabilistic
KW  - Sociology
ER  -