Columbia subject headings:
Appropriate technology--Africa.
Economic assistance, Scandinavian--Political aspects--Africa.
Water resources development--Political aspects--Africa.
Harvard subject headings:
Appropriate technology--Africa.
Sanitary engineering--Africa.
Water-supply engineering--Africa.
Princeton subject headings:
Appropriate technology--Africa.
Sanitary engineering--Africa--Appropriate technology.
Sanitary engineering--Africa--International cooperation.
Technical assistance, Scandinavian--Africa.
Water-supply engineering--Africa--Appropriate technology.
Water-supply engineering--Africa--International cooperation.