Water and man : a world view /
Nace, Raymond L.
Water and man : a world view / by R. L. Nace. - Paris : UNESCO , 1969. - 46p. : ill. ; 21 cm. - UNESCO and its programme. .
At head of title: The International Hydrological Decade.
Hydrology.--------
Water and man : a world view / by R. L. Nace. - Paris : UNESCO , 1969. - 46p. : ill. ; 21 cm. - UNESCO and its programme. .
At head of title: The International Hydrological Decade.
Hydrology.--------