TY  - BOOK
AU  - POSTON Dudley L
AU  -  BOUVIER Leon F
TI  - Population and society:  An introduction to demography   
SN  - 9781107645936
U1  - Y:5231, Q0;Q7/TD 
PY  - 2017///
CY  - New York
PB  - Cambridge University Press       
KW  - Geography
N1  - Bibliography: p117-123
ER  -