@article {6421,
	title = {Geographic Protein Variation and Divergence in Populations of the Salamander Plethodon Cinereus},
	journal = {Evolution},
	volume = {30},
	year = {1976},
	month = {March},
	pages = {33-45},
	keywords = {Red-backed salamanders, Salamanders -- Habitat, Salamanders -- Population densities},
	author = {Highton, Richard and Webster, T. Preston}
}
@article {6419,
	title = {Evolutionary Interactions Between Species of North American Salamanders of the Genus Plethodon},
	journal = {Evolutionary Biology},
	volume = {4},
	year = {1970},
	pages = {211-256},
	keywords = {Amphibians -- Classification and description, Salamanders -- Habitat},
	author = {Highton, Richard and Henry, Susan A}
}
