@book{121788,
	author = {Wessel, Andrew E.  and Drukey, Donald L., Graml, Hermann J., Mcdonnell, patricia M., Seydel, Dietrich, Steinacker, Ivo},
	title = {The implementation of complex information systems /},
	publisher = {Wiley, },
	year = {1979.},
	series = {Information Science series.},
	address = {New York ; Toronto :},
	note = {Includes illustration and index.}
}