Laos Statistical Information Service (2019). Population Distribution, by Sex and Age Group. https://laosis.lsb.gov.la/tblInfo/TblInfoList.do?fbclid=IwAR1Rx_2fzFhNpoXS9ca1BpAd57ybHeuMhSxtUR9weTz0ONFMqvkvJTumKmo
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