TY  - BOOK
AU  - Spengler,Joseph J ed
AU  - Duncan,Otis Dudley ed
TI  - Population theory and policy: selected readings 
SN  - 0136871526
U1  - 304.60 
PY  - 1956///
CY  - Glencoe
PB  - Free Press
KW  - Population
N1  - Bibliography: p. 510-519
ER  -