@article {KNZ00268,
	title = {A hierarchical analysis of species abundance patterns in grassland vegetation},
	journal = {The American Midland Naturalist},
	volume = {135},
	year = {1990},
	pages = {633 -648},
	keywords = {LTER-KNZ},
	doi = {http://www.jstor.org/stable/2462027},
	author = {Scott. L. Collins and Glenn, S.M.}
}
