Bibliography
Anderson, J. S., R. R. Reisz, D. Scott, N. B. Fröbisch, and S. S. Sumida . 2008. A stem batrachian from the Early Permian of Texas and the origin of frogs and salamanders. Nature. London 453: 515-519.
Anderson, J. S., R. R. Reisz, D. Scott, N. B. Fröbisch, and S. S. Sumida . 2008. A stem batrachian from the Early Permian of Texas and the origin of frogs and salamanders. Nature. London 453: 515-519.
