@book{45544,
	author = {Lehmann, Donald R. and Gupta, Sunil,},
	title = {Marketing research /},
	publisher = {Addison-Wesley,},
	year = {c1998.},
	address = {Reading, MA :},
	url = {http://digitool.hbz-nrw.de:1801/webclient/DeliveryManager?pid=1523845&custom%5Fatt%5F2=simple%5Fviewer}
}