TY  - BOOK
AU  - Smith,Laurence C.
TI  - The World in 2050: four forces shaping civilization's northern future 
SN  - 9780452297470
AV  - GE149 S55
PY  - 2011///
CY  - New York, N.Y.
PB  - Plume
KW  - Cambio global del medio ambiente
KW  - Pronósticos
ER  -