@book{35443,
	author = {Runge, Ian C. and ebrary, Inc.},
	title = {Mining economics and strategy},
	publisher = {Society for Mining, Metallurgy, and Exploration,},
	year = {c1998.},
	address = {Littleton, Colo. :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10742727}
}