📕 Source : WEDC © - TB.001-Cleaning and rehabilitating hand-dug wells. // 2013 // 4 pages.

https://wedc-knowledge.lboro.ac.uk/resources/who_notes/WHO_TNE_01_Cleaning_and_disinfecting_wells.pdf

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https://app.box.com/s/iyc2flvd29094tqztiinqntt1bq0h4rq

Source : WEDC© // Release year — 2013.