Nanodelphys, an Oligocene didelphine / by Paul O. McGrew --

v.6:no.26(1939)

The mammalian genera Arctoryctes and Cryptoryctes from the Oligocene and Miocene of North America / Charles A. Reed -- and William D. Turnbull --.

v.15:no.2(1965)

A soricid and two erinaceids from the White river Oligocene / by Bryan Patterson -- and Paul O. McGrew --.

v.6:no.18(1937)