S. Cairncross, Cumming, O., Jeandron, A., Rheingans, R., Ensink, J. H. J., Brown, J., Cavill, S., Baker, S., Schmidt, W. - P., Amery, J., Bibby, S., Harvey, M., Howard, G., Mulligan, J., O’Connor, H., Ryan-Collins, L., Swann, P., Wijesekera, S., and Woolnough, D.,
“Water, sanitation and hygiene : evidence paper”. Department for International Development, DFID, London, UK, p. 127 p.; 24 fig.; 11 tab.; 6 boxes, 2013.