Lever, Chriotopher. Naturalized mammals of the world / Christopher Lever foreword by H. R. H. The Duke of Endinburgh illustrations by Norma Hansell. - London : Longman, 1985. - xvii, 487 p. : ill. ; 26 cm. Includes bibliographies and indexes. ISBN: 0582460565 Subjects--Topical Terms: Animal introduction.Mammals.