Biblio

Kempster, S. en Hueso, A., “Moving up the ladder : assessing sanitation progress through a total service gap”, vol. 10, nr. 12 (1735), pp. 1-17 : 7 fig., 3 tab., 2018.

Kempster, S. en Hueso, A., “Political economy analysis toolkit”. WaterAid, London, UK, p. 28 p. : fig., 2015.