A water sterilization study in the Philippines.

A water sterilization study in the Philippines.

Manylion Llyfryddiaeth
Awdur Corfforaethol: Philippines. National Pollution Control Commission
Fformat: Visual Material
Iaith:English
Cyhoeddwyd: Washington, D.C. A. I. D. 1976.
Pynciau:
Sewage > Purification > Philippines.
Water > Purification > Philippines.