@book{48659,
	author = {Tilly, Charles. and Tarrow, Sidney G.},
	title = {Contentious politics /},
	publisher = {Paradigm Publishers,},
	year = {2007.},
	address = {Boulder, CO :},
	url = {http://www.loc.gov/catdir/toc/ecip068/2006003610.html}
}