00702cam a2200217 4500 1855619879 TxAuBib 20130131120000.0 100512s2010||||||||||||||||||||||||eng|u 2010017959 9781426307461 1426307462 DLC DLC DLC TxAuBib Marsh, Laura F. Whales. Whales / / Laura Marsh. Washington, D.C. : National Geographic, 2010. 48 p. : col. ill. ; 24 cm. Includes index. 20130131. Sperm whale Migration Juvenile literature.