@inbook {3851,
	title = {Species: Historical Perspectives},
	booktitle = {Keywords in Evolutionary Biology},
	year = {1992},
	pages = {302-311},
	publisher = {Harvard University Press},
	organization = {Harvard University Press},
	address = {Cambridge,London},
	keywords = {species, SPECIES CONCEPTS},
	author = {Stevens, Peter F.},
	editor = {Keller, Evelyn Fox and Lloyd, Elisabeth A.}
}
