2: *Hoofed mammals / chief editors Don E. Wilson, Russell A. Mittermeier ; associated editors Sue Russ, Albert Martinez-Vilalta ; artwork editor and color plates illustrator: Toni Llobet ; photographic editor Josep del Hoyo ; authors Mariana Altrichter ... [et al.] Barcelona : Lynx, 2011 885 p. : ill., tav. color. ; 32 cm.
