@book{204221,
	author = {Selvin, S. and ebrary, Inc.},
	title = {Modern applied biostatistical methods using S-Plus},
	publisher = {Oxford University Press,},
	year = {1998.},
	series = {Monographs in epidemiology and biostatistics ;},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10375148}
}