TY  - BOOK
AU  - Spengler,Joseph J and Duncan,Otis Dudley.
TI  - Demographic Analysis
U1  - D1 S5 
PY  - 1956///
CY  - London
PB  - The Free Press of Glencoe
KW  - Statistics,Fertility Nuptiality and Replacement,Selected Regional Studies
ER  -