Helfman, Elizabeth S.

Our fragile earth [by] Elizabeth S. Helfman. - New York, Lothrop, Lee & Shepard Co. [1972] - 160 p. illus. 25 cm.

Bibliography: p. 156-157.

Discusses man's abuse of the soil and its consequences and some of the ways that soil may be rehabilitated.

LCCN: 72001094 /AC

Subjects--Topical Terms:
Soil conservation--Juvenile literature.
Agriculture--Juvenile literature.
Man--Influence on nature--Juvenile literature.
Soil conservation.

LC Class. No.: S623 / .H397

Dewey Class. No.: 631.4