Walker's marine mammals of the world /
Nowak, Ronald M.
Nowak, Ronald M.Walker's mammals of the world.6th ed.
Baltimore, Md. ; London : Johns Hopkins University Press,
2003.
"Portions of this book have been adapted from Walker's mammals of the world, 6th edition, by Ronald M. Nowak, c1999 ..."--T.p. verso.
Includes bibliographical references and index.
Marine mammals.
Marine mammals