1.
Washington, D.C; Organización Panamericana de la Salud; dic. 1999. 308 p. tab.
Monography
in Spanish, English
| LILACS
| ID: lil-380332
Subject(s)
Health Services Accessibility/trends , Commerce , Canada , Mexico , North America , United States
2.
Article
in English
| IMSEAR
| ID: sea-45145