Katz Cooper, Sharon, When penguins cross the ice : the Emperor penguin migration / The emperor penguin migration by Sharon Katz Cooper ; illustrated by Tom Leonard. - 24 pages : illustrations, map ; 27 cm Includes bibliographical references (page 23) and index. 1846 ISBN: 1406293385 9781406293388 Subjects--Topical Terms: Animal migration--Juvenile literature.Emperor penguin--Behavior--Juvenile literature.Emperor penguin--Migration--Juvenile literature. Dewey Class. No.: 598.47