Highton, R., and R. B. Peabody . 2000. Geographic protein variation and speciation in salamanders of the Plethodon jordani and Plethodon glutinosus complexes in the southern Appalachian Mountains with the description of four new species. In: Bruce, R. C., R. G. Jaeger, and L. D. Houck (Ed.), The Biology of Plethodontid Salamanders. Kluwer Academic/Plenum Publishers [New York, Boston, Dordrecht, London, Moscow], 31-93.