Water for the world /
Helfman, Elizabeth S.
Water for the world / by Elizabeth S. Helfman ; illustrated by James MacDonald. - 1st ed. - New York : McKay, c1960. - 213 p. : ill. ; 21 cm.
Includes index.
Bibliography: p. 204 - 206.
60-10883
Hydrology.
Water for the world / by Elizabeth S. Helfman ; illustrated by James MacDonald. - 1st ed. - New York : McKay, c1960. - 213 p. : ill. ; 21 cm.
Includes index.
Bibliography: p. 204 - 206.
60-10883
Hydrology.