@inbook {6075,
	title = {The origin of evolutionary novelties: pattern and process at different hierarchical levels},
	booktitle = {Evolutionary innovations},
	year = {1990},
	publisher = {University of Chicago Press},
	organization = {University of Chicago Press},
	address = {Chicago},
	keywords = {evolution, evolutionary theory},
	author = {Cracraft, Joel},
	editor = {Nitecki, M. H.}
}
