http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Informe anual del Comisionado de Sanidad al Gobernador de Puerto Rico, ano fiscal de 1923 a 1924
Annual report on vital statistics, disease incidence, treatment procedures, and disease prevention measures in Puerto Rico.
Electronic reproduction. [Bethesda, Md.] : ProQuest, 2014. digital, PDF file. ProQuest U.S. Executive Branch Documents Mode of access: World Wide Web via ProQuest website.