Rockwell, Anne F. Becoming butterflies / by Anne Rockwell ; pictures by Megan Halsey. - New York : Walker & Company, 2002. - 1 v. (unpaged) : col. ill., col. maps ; 24 cm. A class observes the various stages caterpillars go through to become butterflies. ISBN: 0802787983 (reinforced) 0802787975 (hardcover) LCCN: 2001026935 Subjects--Topical Terms: Butterflies--Metamorphosis--Juvenile literature.Caterpillars.Butterflies.Metamorphosis. LC Class. No.: QL544.2 / .R635 2002 Dewey Class. No.: 595.78/9