Analysis of information sources in references of the Wikipedia article "Sinh con" in Vietnamese language version.
|access-date= (trợ giúp)Where nothing effective is done to avert maternal death, "natural" mortality is probably of the order of magnitude of 1,500/100,000.
|journal= (trợ giúp)|journal= (trợ giúp)Where nothing effective is done to avert maternal death, "natural" mortality is probably of the order of magnitude of 1,500/100,000.