@book {6227,
	title = {Phylogenetic patterns and the evolutionary process: method and theory in comparative biology},
	year = {1980},
	pages = {349},
	publisher = {Columbia University Press},
	organization = {Columbia University Press},
	address = {New York},
	keywords = {evolution, evolutionary theory, fossils, paleontology, phylogenetics, phylogeny, speciation, species concepts},
	isbn = {0-231-03802-X},
	author = {Eldredge, Niles and Cracraft, Joel}
}
