Upper Franconian and Lower Trempealeauan Cambrian trilobites and brachiopods, Wilberns formation, central Texas /

by Bell, W. Charles, 1911-1979
Austin : Bureau of Economic Geology, University of Texas, 1962

The Moore Hollow Group of Central Texas /

by Barnes, Virgil E. (Virgil Everett), 1903-1998, Bell, W. Charles, 1911-1979
Austin : Bureau of Economic Geology, University of Texas at Austin, 1977

Early Upper Cambrian faunas of central Montana,

by Lochman-Balk, Christina, 1907-2006, Duncan, Donald C., 1911-1990
[New York] The Society, 1944

Early Upper Cambrian faunas of central Montana /

by Lochman-Balk, Christina, 1907-
[New York] : The Geological Society of Utah, 1944