“Application of Membrane Filtration Technology As a Solution for Supplying Drinking Water to Rural Communities in Developing Countries. Lessons Learned from Using the ‘Waterbackpack Paul’ Filter in Colombia, Challenges and Obstacles”. 2014. REVISTA AMBIENTAL AGUA, AIRE Y SUELO 5 (1): 1-8. https://doi.org/10.24054/aaas.v5i1.1995.