@book{146204,
	author = {Bybell, Laurel M. and Self-Trail, Jean M.},
	title = {Evolutionary, biostratigraphic, and taxonomic study of calcareous nannofossils from a continuous Paleocene-Eocene boundary section in New Jersey},
	publisher = {U.S. G.P.O.},
	year = {1994.},
	series = {U.S. Geological Survey professional paper},
	address = {Washington}
}