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Messerli, Peter; Heinimann, Andreas; Epprecht, Michael; Souksavath, Phonesaly; Chanthalanouvong, Thiraka; Minot, Nicholas (2008). Socio-economic atlas of the Lao PDR. An analysis based on the 2005 population and housing census [Textbook] . Bern: Geographica Bernensia
