Bulletin of the University of Nebraska State Museum
University of Nebraska State Museum
Brett C. Ratcliffe ; illustrations by Mark E. Marcuson
[University of Nebraska State Museum] 1991 Bulletin of the University of Nebraska State Museum v. 12
Available at 1 libraries
Roger K. Pabian and Harrell L. Strimple
Board of Regents of the University of Nebraska c1985 Bulletin of the University of Nebraska State Museum v. 11, no. 1