@book{145454,
	author = {Hughes, Nigel C.},
	title = {Ontogeny, intraspecific variation, and systematics of the Late Cambrian trilobite Dikelocephalus},
	publisher = {Smithsonian Institution Press},
	year = {1994.},
	series = {Smithsonian contributions to paleobiology},
	address = {Washington, D.C.}
}