Sverdrup, Keith A. An introduction to the world's oceans / Keith A. Sverdrup, Alyn C. Duxbury, Alison B. Duxbury - 7th ed. - Boston, Mass. : McGraw - Hill, c2003 - 521 p. : ill. (chiefly col.), col. maps Includes bibliographical references and index ISBN: 0072472804 Subjects--Topical Terms: OCEANNOGRAPHY LC Class. No.: GC11.2 / S937I 2003