@book{53976,
	author = {Posner, Richard A. and Easterbrook, Frank H.,},
	title = {Antitrust cases, economic notes, and other materials},
	publisher = {West Pub. Co.},
	year = {1981.},
	series = {American casebook series},
	address = {St. Paul, Minn.},
	edition = {2d ed.},
	note = {Kept up to date by cumulative supplements.}
}