Columbia subject headings:
Municipal water supply--Economic aspects--Botswana--Gaborone.
Municipal water supply--Economic aspects--Ghana--Accra.
Municipal water supply--Economic aspects--Zimbabwe--Harare.
Refuse and refuse disposal--Economic aspects--Botswana--Gaborone.
Refuse and refuse disposal--Economic aspects--Ghana--Accra.
Refuse and refuse disposal--Economic aspects--Zimbabwe--Harare.
Sewage disposal--Economic aspects--Botswana--Gaborone.
Sewage disposal--Economic aspects--Ghana--Accra.
Sewage disposal--Economic aspects--Zimbabwe--Harare.
Harvard subject headings:
Refuse and refuse disposal--Economic aspects--Botswana--Gaborone.
Refuse and refuse disposal--Economic aspects--Ghana--Accra.
Refuse and refuse disposal--Economic aspects--Zimbabwe--Harare.
Sewage disposal--Economic aspects--Botswana--Gaborone.
Sewage disposal--Economic aspects--Ghana--Accra.
Sewage disposal--Economic aspects--Zimbabwe--Harare.
Water-supply--Economic aspects--Botswana--Gaborone.
Water-supply--Economic aspects--Ghana--Accra.
Water-supply--Economic aspects--Zimbabwe--Harare.
Princeton subject headings:
Municipal water supply--Economic aspects--Botswana--Gaborone.
Municipal water supply--Economic aspects--Ghana--Accra.
Municipal water supply--Economic aspects--Zimbabwe--Harare.
Refuse and refuse disposal--Economic aspects--Botswana--Gaborone.
Refuse and refuse disposal--Economic aspects--Ghana--Accra.
Refuse and refuse disposal--Economic aspects--Zimbabwe--Harare.
Sewage disposal--Economic aspects--Botswana--Gaborone.
Sewage disposal--Economic aspects--Ghana--Accra.
Sewage disposal--Economic aspects--Zimbabwe--Harare.