WHO. Regional Office for Africa -Harare, ZW, WHO / AFRO,
“Africa 2000 : initiative for water supply and sanitation : Brazzaville declaration two years after : progress report”. World Health Organization Regional Office for Africa, Harare, Zimbabwe, p. 96 p + addendum (25 p.) : 5 boxes, 1 fig., map, 3 tab., 1998.