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Author: Nilsson, K., Hope, R., McNicholl, D., Nowicki, S., and Charles, K.
Year of Publishing: 2021
Publisher: University of Oxford and RWSN
Institution: REACH programme
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Author: LOCKWOOD, H. and SMITS, S.
Year of Publishing: 2011
Publisher: Practical Action Publishing Ltd.
Institution: IRC/Aguaconsult