@Book{RANME20161594446, title = "Efficacy of antivariolar vaccination in the Philippines during 1921 and 1922", author = "PADUA, Regino G", publisher = "Chicago : American Medical Association", editor = "American Medical Association", URL = "http://bibliotecavirtual.ranm.es/ranm/es/consulta/registro.do?id=61444", year = "1923", }