@article {4213,
	title = {Beaver Reoccupation and an Analysis of the Otter Niche in Great Smoky Mountains National Park},
	year = {1981},
	institution = {U.S. Department of Interior, National Park Service},
	address = {Gatlinburg, TN},
	keywords = {Beavers, Fauna, Mammals, Rodents},
	issn = {40},
	url = {http://archive.org/details/beaverreoccupati00sing},
	author = {Singer, Francis J and LaBrode, David P and Sprague, Lorrie}
}
@article {4819,
	title = {The Ecology of Beaver in Great Smoky Mountains National Park: Past, Present. and Future Speculations},
	year = {1980},
	note = {Maps},
	month = {circa},
	institution = {University of Massachusetts at Amherst},
	keywords = {Abrams Creek, Beavers, Fauna, Hazel Creek},
	author = {LaBrode, David P and Singer, Francis J}
}
