A. P. Agyei, Awuah, E., en S. Kwarteng, O.,
“Faecal sludge management in Madina, Ghana : paper prepared for the West Africa Regional Sanitation and Hygiene Symposium, 10-12 Nov 2009, Accra, Ghana”, presented at the 2009-11-10, 2009, p. 10 p. : 3 fig., 1 tab.