Pearson, Helga Sharpe, 1898-2005-10-062005-10-061923http://hdl.handle.net/2246/1877p. 61-96 : ill. ; 24 cm.Includes bibliographical references.3692804 bytesapplication/pdfen-USQH1 .A4 vol.48, art.3, 1923Perchoerus.Skull.Peccaries, Fossil -- West (U.S.)Mammals, Fossil -- West (U.S.)Paleontology -- Oligocene -- West (U.S.)Paleontology -- West (U.S.)Paleontology -- White River Group.Paleontology -- Oregon -- John Day Formation.Some skulls of Perchoerus (Thinohyus) from the White River and John Day formations. Bulletin of the AMNH ; v. 48, article 3.Skulls of Perchoerus from White River and John Day formationstext