TY  - BOOK
AU  - Keyfitz Nathan
TI  - Introduction to the mathematics of population with revisions
T2  - Addison Wesley series in behavioral science
U1  - B28:(Y:5), K8-;3 
PY  - 1968///
CY  - London
PB  - Addison Wesley        
KW  -  Mathematics
KW  - Statistics
N1  - Bibliography 445-470p
ER  -