@book{135868,
	author = {Darst, David M.},
	title = {Portfolio investment opportunities in precious metals /},
	publisher = {Wiley,},
	year = {2013.},
	series = {Wiley RealTime Finance},
	address = {Hoboken, New Jersey :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10784805}
}