Ripple, Jeff, 1963- Manatees and dugongs of the world / text by Jeff Ripple ; photography by Doug Perrine. - Stillwater, MN : Voyageur Press, c1999. - 131, [13] p. : col. ill. ; 29 cm. - WorldLife discovery guides . - 599.55 . Includes bibliographical references (p. [7]). ISBN: 089658528X Subjects--Topical Terms: Sirenia.Sirenia--Folklore. Dewey Class. No.: 599.55