Pigs, peccaries, and hippos /
Oliver, William L. R.
IUCN/SSC Pigs and Peccaries Specialist Group.
IUCN/SSC Hippo Specialist Group.
Gland, Switzerland  : IUCN,
1993.
At head of title: Status survey and conservation action plan.
Produced jointly by IUCN/SSC Pigs and Peccaries Specialist Group and IUCN/SSC Hippo Specialist Group.
Includes bibliographical references.