Virgin territorySusan Fisher Sterling, Berta M. Sichel, Franklin Pedroso · First published 2001Open the Tome
Physical EnvironmentC. Mark Cowell, Greg Bierly, John Oliver, Susan M. Berta · First published 1999Open the Tome
Archaeology of the mixed grass prairieTimothy G. Baugh, Susan M. Berta · First published 1984Open the Tome
