@book{8408,
	author = {Harper, Peter S.},
	title = {Practical genetic counselling /},
	publisher = {Arnold,},
	year = {2004.},
	address = {London ;},
	edition = {6th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0626/2005274255-d.html}
}