TY  - SER
TI  - Natural Resources in 2020, 2030, and 2040: : Implications for the United States 
PY  - 2013///
PB  - Office of the Director of National Intelligence
KW  - Prospectiva
KW  - Recursos naturales
KW  - Estados Unidos de América
UR  - http://espas.eu/orbis/sites/default/files/generated/document/en/NICR%202013-05%20US%20Nat%20Resources%202020%2C%202030%202040.pdf
ER  -