Robert Diffendal
University of Nebraska-Lincoln
Robert Matthew Joeckel
University of Nebraska - Lincoln
Duane Eversoll
University of Nebraska-Lincoln
C. Schultz
University of Nebraska State Museum
Sue Lackey
University of Nebraska-Lincoln
E. Reed
University of Nebraska-Lincoln
Dana Divine
University of Nebraska-Lincoln
E. Reed
University of Nebraska-Lincoln
Mark Burbach
University of Nebraska-Lincoln
C. Schultz
University of Nebraska - Lincoln