Mammalian faunal zones of the bridger middle eocene
Gazin, C.L.
Mammalian faunal zones of the bridger middle eocene - Washington 1976 - 1-25 p. - Smithsonian Contributions to Paleobiology. No. 26 .
Mammalian faunal zones of the bridger middle eocene - Washington 1976 - 1-25 p. - Smithsonian Contributions to Paleobiology. No. 26 .