TY  - BOOK
TI  - National space policy of the United States of America
PY  - 2010///
PB  - Seal of the President of the United States
KW  - Seguridad
KW  - Estados Unidos de América
UR  - http://www.whitehouse.gov/sites/default/files/national_space_policy_6-28-10.pdf
ER  -