Crow, Sandra Lee, 1948- Penguins and polar bears : : animals of the ice and snow / [electronic resource] / by Sandra Lee Crow.. — [Washington, D.C.] : : National Geographic Society,, c1985.. — 32 p. : : col. ill. ; 29 cm. - Books for young explorers.
Анотація: 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.