http://blogs.washplus.org/drinkingwaterupdates/2012/01/plastic-bags-for-water-treatment-a-new-approach-to-solar-disinfection-of-drinking-water/ from the WASHplus Project Tue, 22 Sep 2015 12:34:42 +0000 hourly 1 http://wordpress.org/?v=3.1.4