TY  - BOOK
ED  - E.U.A. Social Security Administration
TI  - Social Security Programs Throughout the World: The Americas, 2011
U1  - 368.40970 21
PY  - 2012///
CY  - U.S.A
PB  - Social Security Administration (SSA), International Social Security Association (ISSA)
KW  - Seguridad Social
KW  - América
KW  - 2011
UR  - http://www.ssa.gov/policy/docs/progdesc/ssptw/2010-2011/americas/ssptw11americas.pdf
ER  -