Precious water=Eaux rares=Aguas preciadas/
photographs [by] Dominique Roger.
- Paris : Unesco, 1981.
- [68] p. : chiefly illustrations
In English, French and spanish.
9230019631
10250081
Water.
Water-supply.
In English, French and spanish.
9230019631
10250081
Water.
Water-supply.