TY  - BOOK
AU  - Weeks,John Robert
TI  - Population: an introduction to concepts and issues 
SN  - 0-534-2976-3
AV  - HB871 W44 2002
U1  - 304.6 21
PY  - 2002///
CY  - Belmont, California
PB  - Wadsworth/Thomson Learning
KW  - Población
ER  -