http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
HIV AIDS in Costa Rica: epidemiological and sociological features, 1993
University of Costa Rica. Instituto of Investigations in Health. Section of Infection/Nutrition
Separata de Cellurar and Molecular Biology, vol. 41, n° 1: suppl