@article {3576,
	title = {The Ecology of the Southern Appalachian Grass Balds},
	journal = {Ecological Monographs},
	volume = {28},
	year = {1958},
	pages = {294-336},
	publisher = {Ecological Society of America},
	keywords = {Climate, Conservation, Ecosystem, Flora, Grassy balds, Heath balds, Soils, Topography},
	isbn = {00129615},
	author = {Mark, A. F}
}
@article {3577,
	title = {The Flora of the Grass Balds and Fields of the Southern Appalachian Mountains},
	journal = {Castanea},
	volume = {24},
	year = {1958},
	month = {March},
	pages = {1-21},
	keywords = {Biodiversity, Ecosystem, Flora, Grassy balds},
	author = {Mark, A. F}
}
@article {2980,
	title = {Factors Involved in the Persistence of Montane Treeless Balds},
	journal = {Ecology},
	volume = {38},
	year = {1957},
	month = {January},
	pages = {140-142},
	keywords = {Ecosystem, Grassy balds},
	author = {Billings, W. D and Mark, A. F}
}
