C. Moore, Biran, A., and Dem, T.,
“Hygiene : a crucial piece of the puzzle for the impact of WASH”, vol. 21. IRC, The Hague, the Netherlands, p. 23m 56s, 2018.
I. J. Krukkert and Dem, T.,
“Hygiene cost effectiveness study in Bhutan”. IRC and SNV, The Hague, the Netherlands, p. 43 p., 27 fig., 11 tab., 2018.