50 simple things kids can do to save the Earth / The Earth Works Group.
- New York, NY, US : Scholastic, 1991.
- 156 p.
0590-44249-X
Earth--Juvenile literature.
Global warming--Juvenile literature.
J 363.7 FIF.
0590-44249-X
Earth--Juvenile literature.
Global warming--Juvenile literature.
J 363.7 FIF.