@book{15147,
	author = {Greenhut, Melvin L. and Norman, George,},
	title = {The economics of imperfect competition :},
	publisher = {Cambridge University Press,},
	year = {1987.},
	address = {Cambridge [Cambridgeshire] ;},
	note = {Includes indexes.},
	url = {http://www.loc.gov/catdir/description/cam023/86011707.html}
}