K. O. Abass y Dunia, E.,
«Sanitation centre : a catalyst for the adoption of safe sanitation in small town, Yobe State, Nigeria : paper prepared for the West Africa Regional Sanitation and Hygiene Symposium, 3-5 Nov 2009, Accra, Ghana», presented at the 2009-11-03, S.l., 2009, p. 5 p.; 4 refs.; 2 tab.; 3 photographs.