http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Guide for the organization of health services in rural areas and the utilization of auxiliary personnel
recommendations of two PAHO/WHO working groups convened in Washington, D.C., in April 1974
Publicaciones científicas (Washington, D.C.) ; no. 290