Cunningham, Carol, 1954- Horn of darkness : rhinos on the edge / Carol Cunningham, Joel Berger. - New York : Oxford University Press, 1997. - viii, 246 p. : ill., map ; 25 cm. - 599.72/8 . Includes bibliographical references (p. [237]-240) and index. ISBN: 0195111133 (alk. paper) Subjects--Topical Terms: Black rhinoceros.Wildlife conservation--Africa. Dewey Class. No.: 599.72/8