@book{7958,
	author = {Crabtree, John, and Whitehead, Laurence.},
	title = {Unresolved tensions :},
	publisher = {University of Pittsburgh Press,},
	year = {2008.},
	address = {Pittsburgh, Pa. :},
	url = {http://www.loc.gov/catdir/toc/ecip0815/2008016330.html}
}