@Book{RANME20161596211, title = "A brief analitical study of the intra-annual variation of the birth-death ratio, or vital index, in the Philippines", author = "PADUA, Regino G", publisher = "[S. l.] : [s. n.]", editor = "[s. n.]", URL = "http://bibliotecavirtual.ranm.es/ranm/es/consulta/registro.do?id=61621", year = "1928", }