@book{6192,
	author = {Leenders, Michiel R. and  Fearon, Harold E.},
	title = {Purchasing and materials management /},
	publisher = {Irwin,},
	year = {c1989.},
	address = {Homewood :},
	edition = {6th ed.},
	note = {The 1st and 2d ed. by H. T. Lewis published under title: Procurement: principles and cases; 3d ed. by H. T. Lewis and W. B. England; 4th ed. by W. B. England; 5th ed. published  under title: Modern procurement management: principles and cases.}
}