Penguins and polar bears : animals of the ice and snow /
by Sandra Lee Crow.
- [Washington, D.C.] : National Geographic Society, c1985.
- 32 p. : col. ill. ; 29 cm.
- Books for young explorers .
Describes the physical characteristics and life cycle of two animals adapted for survival in polar climates, the penguin at the Antarctic and the polar bear at the Arctic.