Technology for water supply and sanitation in developing countries report of a WHO Study Group.

Manylion Llyfryddiaeth
Awdur Corfforaethol: WHO Study Group on Technology for Water Supply and Sanitation in Developing Countries
Fformat: Llyfr
Iaith:English
Cyhoeddwyd: Geneva World Health Organization 1987.
Cyfres:Technical report series (World Health Organization) 742.
Pynciau: